581Views7Replies

Author Options:

Where can I find convex lenses with a focal length of Answered

Hello,

I'm searching for a convex lens for focussing the beam of my laser. The focal length should be smaller than 1cm.
I've searched in cd/dvd readers/burners but those lenses are never good enough because either the focal length or the size of the lens isn't good.


Thanks in advance,

Electorials

7 Replies

user
steveastroukBest Answer (author)2011-08-06

Cheap dollar store "microscopes" or "telescopes" often sold as toys

Select as Best AnswerUndo Best Answer

user
cwleveck (author)2012-07-18

I know this is kind of an old question but I have been tearing apart old scanners for the stepper motors, lamp, rod and bushings. I also take off the motor driver chips, etc. I haven't been able to figure out what to do with the lenses until tonight. I was searching here to find out info about collamating (sp?) lenses and thought I'd look in my drawer full of scanner lenses (literally) almost all fo them are very similar in construction. Scrape off the glue and unscrew the insert and three lenses drop out. I believe one is (, one is shaped like )(, and I believe the last one is |). Sorry for the improv with the punctuations.... Anyway I am going to play with them in different combos. They are all glass so far, seem to be of nice quality and they are all the right size. Plus if im carefully creative I believe I can make use of the housings.
Anyways, interested in anyones thoughts.
My first "anserable" so be nice.

Select as Best AnswerUndo Best Answer

user
HARaaM (author)2011-08-07

I used a glass marble once.

Select as Best AnswerUndo Best Answer

user
steveastrouk (author)2011-08-06

Maybe ? For sure they have short focal length lenses.

Select as Best AnswerUndo Best Answer

user
orksecurity (author)2011-08-06
user
orksecurity (author)2011-08-06

Edmund Scientific, back when they still handled surplus goods, used to be *the* source for educational/experimenter lenses. Unfortunately someone bought the name, may years ago, and they became a tech-toy store rather than a maker store. The optical business forked off as Edmund Optics; I don't know whether EO still has a cheap line.

Select as Best AnswerUndo Best Answer

user
steveastrouk (author)2011-08-06

A cutting laser ? or a visible one ?
Cutting lasers will need ZnSe lenses
Steve

Select as Best AnswerUndo Best Answer