How can I make an optical slide projector using a combination of convex lenses? - used slide projector truly excellent
What should the focal length of the two lenses. If I were a convex lens with 50mm focal length of 300 mm and a focal length that I use to enlarge the slide?
Used Slide Projector Truly Excellent How Can I Make An Optical Slide Projector Using A Combination Of Convex Lenses?
1 comments:
Backlight of the blade with a light and lens FL gets a little more than 1 slide (50 mm to 300 mm). If the diameter of the lens are comparable to the wavelength of the classification would generate a higher percentage of the lamp, so try first. Otherwise, you have) the least with the F (FL / diameter. Most of the FL, but the project over the image (measured diagonally).
You can play with lighting more efficient use through the lens of 50 mm between the bulb and slide, but not absolutely necessary if you have a compact and slim lamp. Compact level, such as halogen lamps (12 W Osram FCR) are most effective.
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