Newsflash! The photos below show a slide viewer that allows you to view a single slide with both eyes. It might have similar optics to the device in this Instructable. I suggest trying the following:
1. order a slide viewer on e-bay for $10-20.
2. cut the viewer in half along the slot for the slide.
3. cover the eye holes with the red and blue colored filters.
4. put your camera where the slide goes and take a photo.
Please let me know if this works.
Step 1: Before you start...
Step 2: Gather the supplies.
+ Black mat board from an art store.
+ Red filter material that matches the filters on the 3D glasses (Roscolux #26 matches typical stock glasses available at a stage lighting store)
+ Cyan (blue) filter material that matches the filters on the 3D glasses (Lee #354 matches the cyan filters on most stock glasses available at a stage lighting store)
+ Some 5mm or 1/4" fiberboard.
+ Beamsplitter (50%) 76x102x3mm (Anchor Optical B27122)
+ Mirror 76x114x3mm (Anchor Optical B20850)
+ Four matching (76mm) posts (optional)
+ A sharp utility knife
If the optics listed above aren't available, try to purchase optics with similar dimensions. Anchor Optics is a cheap source:
Beamsplitters (find a beamsplitter about a 50/50 reflection/transmission ratio)
Try to find a mirror with a matching height to the beamsplitter:
You would need to adjust the mirror and beamsplitter holder to fit the new dimensions (i.e. the grooves should accommodate the thickness and the height and width might change). If you make one with different optics, please let me know how it works.
Step 3: Print Template
Step 4: Use this template to cut the walls out the mat board. I traced the pattern on the mat board first and used a ruler and utility knife to cut the pieces.
Step 5: Tape the filter material to the rectangular windows. The red filter is for the large window.
Step 6: Cut the top and bottom panels
Step 7: Cut standoffs (optional step for a stronger device)
Step 8: Assembly time!
Step 9: Tape the walls in place
Step 10: Take some photos
Step 11: Hints? Next steps? Share photos?
Step 12: What's going on?
The filters are allowing the red part of the spectrum into the part of the photo that your right eye would be seeing and the blue filter is only allowing the blue light into the part of the photo that your left eye would see. When you view the photo, you don't want your right eye to see the left eye (blue) image, so you erase it by placing the same blue filter in front.