Thursday, December 29, 2011
Little Eye Contraption
LITTLE EYE CONTRAPTION
This amazing Little Eye Contraption is a monocular pinhole telescope that uses only one glass lens. Economically it can give the Big Brain a Seeing Eye which it can control. Explore the pinhole lens telescope and see what new things are discoverable..
In continuing experiments with a variety of eyes and telescopes, the Big Brain has created yet another scope of unusual nature, this time it uses a refracting element as the primary and a tiny pinhole eyepiece created from a sheet of aluminum bakers foil punched with a needle.
Make various size pinholes and try to get the most circular possible. This telescope works well on bright objects like the Moon but do not use it on the Sun. If the pin hole ocular is too small, diffractions effects will begin to take place and the image will degrade and become too dim. If the pinhole is too large, a degrading and blurring will take effect. Try experimenting for the optimum conditions.
The primary lens is a simple magnifier lens obtained from a dollar store. Experiment with various size diameters and focal lengths.
Increasing Image Quality
Stop down the lens with a circular aperture mask and the image quality may improve substantially.
Make a Zoom Lens
The telescope can be converted into a Zoom by varying the distance between the pinhole and the objective lens. In this example the Brain has used a large magnifying glass as the primary objective to create a refractor telescope.
Enable Inverted Images or Not
You can make the telescope perform with images either upside down or right side up by varying the distance between the ocular and the convex lens.
Try using your camera in macro mode or electrical sensor to do some astro imaging or eye work. Use the technique of pinhole projection. If we get results on the Moon if it ever stops raining, we'll report back here with the images. Use a method of photography for terrestrial results.
Try replacing the pinhole ocular with a piece of wax paper. It will form images of bright objects that can be observed visually or photographed.