fibre optics

Hello, Hope to find here some information about Optical Fibres. I am building an under water housing for DSLR. I want to use it just under the water surface. Controlling (through an air bridge) and exposure (through optical light guide) are on land. The question is about optical fibres. I need a 160 cm long Fibre Optic Lightguide. A 1/4 inch diameter guide costs near 200 GBP. When I would make one myself of 1/2 inch diameter, I could safe 75 % + the entrance surface is more than 3 times larger, which is important, since I will have to guide the light of a flash gun! BUT, I doubt wether such a diy bundle of 1,5 mm diameter plastic fibres from ebay will give me roughly the same or preferably more light output as/than a professional guide? How do these plastic ebay fibres compare to professional or glass fibres in terms of light transfer efficiency? Any suggestions? If not, then a reference to another forum where they might be able to answer my questions, would be much appreciated.

Topic by butterflies55555   |  last reply


New group started - Optic fiber

I'm read a lot of document about optic fiber, and I've seen that: -many people are interested in optic fiber (it's magic, just like leds are) -people make some good craft with optic fiber, but sometime don't have the needed understanding of how it works, how to cut it, sand it, bend it, ...) -reader of the nice instructables here have trouble buying optic fiber when they want to start new project. I hope this group will help people learning from eachother, leading to new more interesting project and instructables. tReg.

Topic by treg 


Optical illusions are fun

How many animals do you see?

Topic by Downunder35m   |  last reply


Optical Mouse Help!

I need someone to explain a typical optical mouse circuit to me using diagrams and such. I could do it myself but I only have one optical mouse on me at the moment so Id have to go to the store to get a really cheap one. I'm on the verge of a kipkay quality instructable!

Topic by emuman4evr   |  last reply


Fibre optic tree?

I want to run my Christmas fibre optic tree without the motor.  Would I have to alter anything, its lamp is 15w 12v?

Question by eileenlilley   |  last reply


Jesus optical illusion

Does anybody know why this works, its so cool! Stare at the 4 dots in the middle for 30-40 seconds, then look at something like a white wall. Then blink, what do you see?

Topic by guyfrom7up   |  last reply


optical pulse oximeter

Hello everybody, I have a big problem. I want to do for the optical pulse oximeter project was a link posted here.  I need the code and the circuit diagram in there to do the project. this is an emergency. can you help me please? Can you at least provide me access to people who share the project's e-mail address? thank you and I am waiting for your help. my e-mail adress: merveebudakk@gmail.com

Topic by mervebdk   |  last reply


Refinishing Optical Media

I was thinking about ways to actually get good data off of a fucked disk. I figured for a permanent solution, instead of grinding the disk down, or filling it in with greasy things, actually reforming the surface of the disk with some clear resin or acrylic. Comments?

Topic by Crash2108   |  last reply


a DIY optical port

I have been intrested in optical computer for a while but found them rather expensive to build so I tried to look for cheaper ways to build some key features like the gates. The basic idea is to use solar cells that power a led. For and OR-Port you use solarcells where it is enough that one of the side gets light to make the led burn. To make and AND-port, you can put a resitor in between so that it really needs the power form both channel sot make a led burn. For a NOT-port you put an invertor in, so that when it burns it gives no signal, and wheren it does not receive light it burns this because of a battery it caries. A NOT-port is almost like a led-throwie.I do hav emore but wanted to know if this would be a good place or not, or if someones intrested in hearing on how to build a full optical computer, still basic, but almost completly optical, or if it would be better to post this on the microprocessor group at the opencourseware of the MIT ?

Topic by Floris Vermeir   |  last reply


Plastic Optic Fiber

Hi, I made a lot of research in order to find some plastic optic fiber in europe, and I finaly add to buy some full rolls of the one I liked. It it PMMA fiber with 0.3dB/m light loss, it polish well, and when use with long length, gives a sligher yellow / green color to the light (noticeable on white light, but really lower than the other I've tryed). If someone need some, I can make a kit with : -27 meters of 0.75mm diameter -15 meters of 1.00mm diameter - 7 meters of 1.50mm diameter I think thati ncluding shipping to anywhere I can send it for tens euros. If someone is interested, let me know and I will check shipping price and paypal fees. Regards, tReg.

Topic by treg   |  last reply


Freaky Optical Illusion!

Here is a cool optical illusion I got in an email:'The Brain'This is quite amazing..If you see this lady turning in clockwise you are using your right brain. If you see it the other way, you are using left brain.Some people do see both ways, but most people see it only one way.See if you can make her go one way and then the other byshifting the brain's current.BOTH DIRECTIONS CAN BE SEENExperimentation has shown that the two different sides, or hemispheres,of the brain are responsible for different manners of thinking.The following table illustrates the differences between left-brain andright-brain thinking:Left Brain Right BrainLogical RandomSequential IntuitiveRational HolisticAnalytical SynthesizingObjective SubjectiveLooks at Looks atparts wholesMost individuals have a distinct preference for one of these styles of thinking. Some, however, are morewhole-brained and equally adept at both modes.In general, schools tend to favor left-brain modes ofthinking, while downplaying the right-brain activities.Left-brain scholastic subjects focus on logical thinking,analysis, and accuracy. Right-brained subjects, on theother hand, focus on aesthetics, feeling, and creativity.If you look away, she may switch from one direction to the other.I found that if I just look at her feet or relax and look at the floorwhere the reflection shows, she will switch direction!

Topic by Arbitror   |  last reply


Optical Image Stabilization

Hi everyone, I have a little awkward question here but I am sure someone who knows a little bit more about electronics can give me good advice. I took apart the lens from a consumer video camera and took out the Optical Image Stabilization module in an effort to figure out how it works and possibly hijack the signal so I can control the movement. In the camera this module is getting the signal from the accelerometer so it knows how to engage the two electromagnets and counteract the movement (shaking). What I have done is take the leads that go into it and try to fake what gyro sends to this element. So far I have noticed that when I short 1 and 2 or 3 and 4 the element goes to one side or up. So I put a potentiometer on it (2K ohm) and it gives me some control by turning the dial, but not good enough. Has anyone any idea how can I achieve a gradual movement of this lens element vertically and sideways with a slider or dial of some sort? Your help would be greatly appreciated!

Topic by Sudija 


How to make your own fat optical fiber for solar device?

I'm prototyping a solar energy device, and need to transport a concentrated light beam a couple of meters without loss or, ideally, burning anyone's hand off. I was thinking of some kind of 'total internal reflection' medium, such as glass, but it needs to be cheap and easy to make/find, and it would be great if it had at least a little flexibility. Is there any way to make your own? Some kind of gel, or crystal, or maybe water if it wouldn't attenuate or absorb too much of the energy? Failing that, is there some existing material I could wrench out the back of something? Cheers, Daniel.

Topic by SolarFlower_org   |  last reply


Using lenses to create a beam of normal light??

If you had, say, light from a torch or whatever, directed it through a metal pipe or fiber optic to get it kind of directional, and then into some arrangement of lenses; what kind of maximum range could you expect before it completely lost focus? And would it still obey the inverse square law, or is that just for expanding spheres of light?

Topic by SolarFlower_org   |  last reply


Lens for a project

Hi! Im gonna try out this project, Telescope , as I know nothing about optic or lens function maybe someone could just let me know if I should go for a Tele-Auto 6.3/400 mm or a Sigma 70-300 mm F4-5,6 DL Macro Super. I asked the creator but as time runs out for me I hope this gives a faster response =) Thanks

Topic by Suizezem   |  last reply


where to get fiber optic scraps for art project

Where can I get fiber optic scraps, 1-2mm glass for an art/tech project? 2-5 ft long about a laundry basket  to small truck bed full.        Houston TX

Topic by broodinghen   |  last reply


How do I add on fiber optic bundles to the end of a large single Fiber optic strand/LED?

I need to figure out how to add on a lot of multi-strand fiber optics to the end of large single strand or single LED. I would like to create a lighted and animated cuttle fish sculpture and I want to know how I would be able to get the most amount of small single dots of light from a single LED. The LEDs will be individually animated in the belly of the beast and light patterns will appear on the surface...

Question by pastaffo   |  last reply


Fiber Optic Illuminated Heels

I found these gorgeous Fiber Optic Illuminated Heels on Fashioning Technology.  These heels from Anastasia Radevich's Kinect 2011 collection.  They are illuminated using fiber optic technology and turn on with switches placed at the ankels.

Topic by Carleyy   |  last reply


Extend optical mouse range

Hi all, I'm wanting to make a jig for a production project requiring a sensitive optical measure of movement with a focal length of 5-10 mm. I thought an optical mouse might be a good start but the lenses in a few I've tried require the device to be too close. It needs to be no bigger than the electronics of a mouse. If anyone has a lens that could be perfect or other ideas I'd love to hear them. Thanks, D

Topic by Qball007   |  last reply


How to use Fiber Optics?

I am making a super-discreet earpiece/IEM that is intended for any use where you feel bored, where you are not supposed to use electronic devices. Meetings, lectures, classrooms, etc. Basically, it's a 3.5mm jack wired to a Balanced Armature driver. Essentially, I remove the big, thick and bulky housings of earpieces and leaving the smaller drivers in place. I've been using thin copper cables in the earpieces I buy. They work, but are still visible. I found that optical cables are near invisible, glass-like. I intend to wire them into my earpieces. So, do I require lots of circuits? I can do those, if they don't poke a black hole in my wallet. No more than USD100, if entirely possible.  I just want to know how to change electricity into light and back again, and allow for audio transfer from MP3 player to earpiece drivers.

Topic by chua_erei   |  last reply


LDR or optical reflective sensor?

I am planing to make a line following robot without micro controllers. So I am using a light sensor connected to an AND GATE (the other input being the current to the motor). So since I am using" an and "gate I want the input current to be an absolute zero or some value ,ie the current should not be varrying with the light intensity. Besides I think I might drop the "and gate" thing and use an OPAMP instead as it would give me a varrying output current which is all I need

Question by chrissunny94   |  last reply


​Make an optic close focus.

I want to be able to put my night vision monocular in front of my 2x scope on my airsoft.I need a combination of lenses to put between my scope and the NV to let the scope focus at a couple of inches (instead of 30 feet), and reduce magnification because otherwise I’d just be looking at a tiny part of the phosphor screen heavily magnified.I know it’s possible because a commercial unit is available, I just don’t know if it’s feasible for a guy like me (doesn't have a degree in optics) to build (I'm thinking no, but I figured I'd ask).Thanks for any help you can offer.

Topic by instrucables360   |  last reply


Optics question; physics homework... Answered

Hi guys, There is a new physics teacher at school and he asked us this question: an object fell into a very dark hole in the ground and you don't have a flashlight, but the sun is 30 degrees above the horizon. Using a mirror you have to reflect light from the sun into the hole. In one case the hole is one meter deep and in the second case it's three meters deep. The question is: what angle should the mirror be placed in relation to the sun (or horizon) to illuminate the hole? I don't really remember how to calculate this so if you can help me that would be great. Thanks!

Question by Eunix   |  last reply


How would I make a sensor sense motion coming at me from behind while I'm moving forward?

I'm trying to make a small sensor that would detect a large object coming at me from behind at about 60mph while I'm moving forward at around 7mph. What kind of sensor would I use? I looked up the different types and I found Passive/active infrared, optic-based, piezoelectric, and ultrasonic. I tried to figure it out myself and my best guess is ultrasonic? Like what cars use to detect deer, they use "ultrasonic airflow sensors". Ideally the sensor would beep and get louder or faster as the object approaches. Would I use an arduino? I'm very new at this :/ Thanks for any help!

Topic by arrowstation   |  last reply


What fun project can I do with around 300 Liconix high powered laser lenses Collimator ,optic lenses, Optic Filter..etc

Old Neighbor of mine was a Senior Laser Technician for Liconix about 10-15 years ago probably still works there. Anyhow he always would always be working on lasers Argon, Helium, Krypton, and his classic cars and overtime his family became sort of family to me. I would watch in awe as he worked trying to learn as much as possible. So I would help him work on his cars or Fix a PC for him here and there or take care of his son. I was only 13 at the time, but he was nice enough to give me a couple lasers for helping that his work was going to discard, some helium, Argon. I had to give the Argon back though because he sold his house and was moving to a better neighborhood. Plus it kept blowing the fuses in my parents'house from the power load. PGE was getting angry cause for some reason the street light sensors in my neighborhood were somehow getting burned out all the time *shrug* I don't know how and had to keep repairing them. Before he left he gave me some extra tubes for when my others eventually died. Most helium and tons of lenses of various sizes which are all tucked away in a box. In my dad's Garage of Death yeah he's a pack rat. But I found a couple of the lenses when I came to visit that I had sitting around the house and thought to myself time to dig the box out, so I'm slowly digging my way to it. Just don't know what fun project to do with all of it other than making a Laser Beam of doom or putting them on Sharks with fricken laser beams attached to their heads I also have a Fresnel lens from a 45 inch rear projection TV. Any Idea what fun project I should make with all of it ? I bet it would make one hell of a laser pointer for my Celestron GPS-GOTO C11 Telescope haha.Thanks for any idea's.

Question by Laser_PewPew   |  last reply


Arduino Home Theater Screen Design

Hello Makers! I have been designing a home theater retractable screen housing that is arduino based. I want to use stepper motors for the added precision and will be playing with some minor resin/fiberoptics to decorate the front in a movie theater-esq manner. My concern is with the stepper motors. I would love to know if anyone has attempted a similar project. The speed of the descent/retraction is not all that important but consistency is another story. I also have some power concerns. Any input would be greatly appreciated.

Topic by jab06y   |  last reply


How to make fiber optic filament from fishing line? Answered

I am thinking of making my own fiber optic lamp / toy and was wondering if it was possible to make my own optical fibers from fishing line.

Question by devicemodder   |  last reply



Efficacy of cheap laser pointer optics

Are cheap laser pointer optical units suitable for adapting with high powerlaser diodes from DVD-RW drives. I don't have access to internet transactionsso I can't get a laser module.

Topic by volthead 


10 Optical Illusions in 2 Minutes

The new advertising is a little longer, but a little more entertaining as this short video is a good example of. I don't care much about getting a new phone, but kudos to Samsung for making a playful video that compiles some classic optical illusions.via Techeblog

Topic by fungus amungus   |  last reply


Optical fibre cable DAC chip??

Hey everyone,I'm trying to take an audio signal from an optical fibre cable pass it through a DAC0800LCN IC, 8BIT DAC chip and input into the Arduino. I'm trying to use a 3 pin fiber optica toslink transmitter to connect the fibre optical cable to the DAC chip. Does anyone know how to set this up or even if this would work? If anyone could answer this is would be much appreciated.

Question by MCsugar43 


fiber optic transmitter and reciever booster

I am a hobbist/inventor/sculptor/geek. I am looking for plans or a kit to build a fiber optic booster transmitter and reciever. Or even a unit that can send and recieve data and video signals. The signal must be able to travel a minimum of 300 ft. I am trying to build a submersible rov that I can afford. The other option that I might have is a rf to fiber optic converter. Would anyone be able to help me out?

Topic by batguanno 


optical sensors from projection TV

I have a *lot* of junk from old TVs -  projection lenses, a fresnel lens and pcbs. so far I've only used caps and resistors in small projects. recently I came across a set of 4 optical sensors anchored to the inside of a projection TV, I believe they are used for auto alignment of the RGB images on the mirror. What is a good project to use these in? could I use them to possibly build some sort of solar tracker ? perhaps using an arduino ? any ideas appreciated.

Topic by dhymers 


In kipkays optical theremin, would you make the pitch lower?

Http://rsinventionlab.com/optical-thereminI'm trying to play the sound through a 12 inch sub, and i need a lower pitch

Question by rickyd! 


usb over fiber optic cable

My house was once part of a business that was connected to neighboring structures via fiber optics for Internet.  I want to put in a security system with some usb cameras and of course we know what those limits are.  I have successfully made 25' usb/cat5 cables using this site... they work great but I need 50 - 60'.  I was wondering if it was possible to utilize these fiber cables for the data side of the usb and somehow power it by other sources?  I know a little about fiber like putting in connectors and such and I do have 2 transceivers.  I can make rj45/usb connectors for the tranceiver ends but I'm just not sure of the details or even if I'm barking up the right tree.  I'm not sure where the power fits in either. Any of you geniuses know how I could do this? Thanks

Topic by cornflake000   |  last reply


Spring-loaded optical drive door?

Hello, I just build a new desktop PC and would love to have a spring-loaded door, with an eject button, to cover my CD/DVD drive, like the ones on HP or Acer computers I can't seem to find any sold commercially. Does anybody know how to build one?

Question by CanCB   |  last reply


Fiber optic cable to laser projector? Answered

I purchased a "Mr. Christmas" Laser (green) Outdoor Holiday Projector to add to my holiday lighting this year. Being rightly concerned with theft if I was naive enough to leave the projector outside, I thought of using fiber optic cable attached to the laser lens housing (still haven't worked out how I would accomplish that), and routing it from inside the house to a point outiside where the cable end would project on a wall or my garage door, providing a show (sans sound), but protecting the laser projector from theft. Is my idea feasible? If not, I'm open to suggestions. Thanks. 

Question by Oldie Juan Kenobi   |  last reply


Motor and base design for optical toys

Hello everybody! I'm in the process of building a reiteration of a series of optical toys (like this one, or these) with motor, stroboscopes and little music system. The thing is their discs measure about 1 m (like 3,2 feets) and one of them (praxinoscope) is a heavy one due to the mirrors it possess (see photo [it isn't it's actual state]) so I created a metal base for it with a tube, three metal angles as legs and washing machine 115v ~60hz 70W 250VAC single phase motor soldered on (with capacitor), so the disc sits on top of the motor, and the thing is that after an hour of so of being tested on continuous duty it stopped and started to smell like burnt. What could the problem be? Could it be a design problem since the motor has all that weight on top? Should I have used gears and pulleys? How can I make it last longer without it being to complex?  If someone can help or has some ideas I'd appreciate it , thanks in advance! Benkos M. G.

Topic by BenkosM   |  last reply


Optical reading of paper cards/tape? Answered

Hi everyone,  I wanted to know what would be involved in reading the position of dark marks on paper cards or tape, a la IBM. Something that can read the information from the card with things like pencil/ink marks instead of holes punched through it.  What would I need? Could I get away with basic LEDs, or would I need something more complex like a CCD from a scanner?  Many thanks!

Question by DrRorschach   |  last reply


How to bend plastic optic fiber ?

Hi, I have 0.75, 1 and 1.5mm plastic opic fiber that I am using for my project (which will be the topic of my first instructables ;) ) I need a way to bend the POF in right angle. I don't care if the bending raidus is not very important (spec says max radius is 10 time diameter, 15mm radius is ok for me, and I don't care if I loose a little brightness). I want the POF to stay bend after I have bent it : it must keep the curve I gave it for at least 24 hours. I manage doing something not so bade (but really time consuming) by heating the POF with an hair dryer. I wander if anybody has a better tested idea ? (in the meantime, I'll try putin it in boiling water to see if it kep the shape once cooled). Regards, tReg.

Topic by treg   |  last reply


fiber optic star field without attic?

Is there a way to make a fiber optic star ceiling without an attic??

Question by tim13211   |  last reply


How does the optics on the "Prayer Cross" work and how might I replicate that? Answered

I was interested in creating jewelry and thought that I could use this as a hard to find place for sensitive information.

Question by Xenel   |  last reply


mouse reassembling

How to reassemble a broken optical mouse?

Topic by krishna_ei   |  last reply


can i use an optical mouse (through an arduino) as a pulse oxymeter?

Arduino can read coordinates from a mouse, a small example is in the following link http://www.martijnthe.nl/2009/07/interfacing-an-optical-mouse-sensor-to-your-arduino/ But how could read color for using mouse as an pulse oxymeter? More than this we could use it with optical fiber adapted to the "eye" of the mouse for intravascular measuring ScvO2 !!!???

Question by clblue   |  last reply


how to convert usb optical mouse to wireless

How to convert my wired optical mouse to wireless? please help me...

Topic by christin_meghan   |  last reply


How do you light sideglow or endglow fiber optic cable with an led or light bulb?

How can one attach the end of a sideglow or endglow type of fiber optic cable to a light source? Either an LED or a light bulb. Thank you very much.

Question by devthered   |  last reply


How to increase the viewing area of an optical mouse?

Hello, I'm just wondering if any of you guys knew how to make the viewing area of an optical mouse bigger. I have an optical mouse, and of course the viewing point is only as big as the hole for the laser is. I'm wondering if I can make it bigger, so if there was a sheet of paper, with the mouse under it, it would track something moving on the paper. basically like this finger-paper-mouse --- | >

Question by Deimos1   |  last reply


Can I use a CMOS part of optical mouse to control my PC?

Hi guys, I want to know if is possible to use a CMOS (part of optical mouse) to make a multi touch screen or similar DIY device to control the pc. The CMOS can be like a IR sensor over my PC monitor. Tks

Question by sidjunior00   |  last reply


how to make 2-way optical fiber comm. system?

Hello, I’m doing my project about 2-way (full duplex) optical fiber communication system. From what I knew, currently there is only 1-way (half-duplex) optical fiber communication system. Thus, I need to upgrade this system to be in 2-way communication system. How to make it? Can I just replace the transmitter and receiver with the transceiver in order to make it and how? Really need help..TQVM in advanced.

Topic by kamiladnan 


Does any one know how i can get fiber optic cable that i can use for small leds Answered

I am also wondering weather nylon cable has the same properties?

Question by LucasOchoa   |  last reply