| DCS # | DEMONSTRATION | REFERENCE | ABSTRACT |
|---|
| 6A65.00 | Thick Lens | | |
| 6A65.09 | computer assisted optics | AJP 55(12),1128 | The
authors describe a program that covers spherical and chromatic aberration
in addition to other topics. BASIC, PC, available from authors. |
| 6A65.10 | improving an image with a stop | PIRA 500 | |
| 6A65.10 | improving an image with a stop | Oh-2 | Use a stop to improve the image through a short focal length lens. |
| 6A65.11 | depth of focus | Oh-3 | Use a six inch long glowing wire as an extended object for showing the effect of stopping down a lens. |
| 6A65.15 | optical disc - circular glass plate | PIRA 1000 | |
| 6A65.15 | optical disc - circular glass plate | Og-4 | Use a circular plate of glass with the optical disc as an example of a thick lens. |
| 6A65.20 | chromatic aberration | PIRA 500 | |
| 6A65.20 | chromatic aberration | 6A65.20 | |
| 6A65.20 | chromatic aberration | Oj-9 | A diaphragm moved near the focus selects red or blue light from beams passing through the edge of a lens. |
| 6A65.21 | aplanic properties of a sphere | 34-1.23 | Aplanic
systems show no spherical aberration or coma for some special position of
object and image demonstrated here with a spherical lens. |
| 6A65.21 | chromatic aberration | Disc 22-22 | Project
spots of light on a screen from several points on a lens. Note chromatic
aberration and then add a second correction lens. |
| 6A65.22 | chromatic aberration | 34-1.22 | Show the image formation distance for red and uv light using a fluorescent screen to display the uv. |
| 6A65.23 | lens aberrations with a laser | 36-7.2 | Good quality telescope and microscope objectives are used to show aberrations in optical systems. |
| 6A65.24 | chromatic and spherical aberration | L-49 | Use diaphragms with central, annular, and other openings to show spherical and chromatic aberration. |
| 6A65.30 | barrel and pincushion distortion | PIRA 500 | |
| 6A65.30 | barrel and pincushion distortion | 6A65.30 | |
| 6A65.30 | barrel and pincushion distortion | L-52 | Project
an illuminated wire mesh with a large lens. Place a diaphragm between the
lens and the mesh for barrel distortion and between the lens and the screen
for pincushion distortion. |
| 6A65.31 | off axis distortion | PIRA 1000 | |
| 6A65.31 | off axis distortion | Disc 22-24 | Parallel rays of light pass through a lens element held off axis. |
| 6A65.34 | astigmatism | Disc 22-23 | Focus light from a circular hole on a screen, then add a cylindrical lens. |
| 6A65.35 | astigmatism and distortion | PIRA 1000 | |
| 6A65.35 | astigmatism and distortion | L-51 | An
illuminated wire mesh is projected onto a screen with a short focal length
condenser lens. Turn the lens about an axis parallel to either set of wires
and the horizontal and vertical wires will focus at different points. |
| 6A65.40 | spherical aberration | PIRA 500 | |
| 6A65.40 | spherical aberration | Disc 22-21 | Project an image with a spherical planoconvex lens. Stop the outer portion of the lens, then the center. |
| 6A65.45 | abberation with a plano convex lens | Oh-1 | A
series of parallel beams around the outside edge of a plano convex lens made
visible with chalk dust are better focused when the light enters the curved
side. |
| 6A65.46 | spherical abberation and coma /laser | AJP 32(5),355 | Diagram and pictures of a setup to project lens aberrations with a laser. |
| 6A65.52 | fillable air lens | PIRA 1000 | |
| 6A65.52 | water lens | Og-2 | A beam of light is directed through a round flask filled with water. |
| 6A65.52 | fillable air lenses | Disc 22-20 | Convex and concave lenses are filled with water and air in water and air. |
| 6A65.53 | spherical lens | 34-1.13 | Compare a thermometer at the center of a water filled flask to one at the far side. Picture. |
| 6A65.54 | wine bottle lens | Og-3 | Fill a round flask with a wine bottle bottom with water and fluorescein to show diverging light. |
| 6A65.55 | watch glass lens | Og-11 | A vertical lens can be formed by pouring various liquids into a watch glass. |
| 6A65.56 | CHOICE OXIDE | O-4c | CHOICE OXIDE GLASS LAMP is viewed through a tube filled with water. |
| 6A65.58 | light beam strikes rod | 34-1.4 | A light
beam incident on the side of a glass rod at some angle will produce a cone
with the half angle equal to the angle of incidence. |
| 6A65.60 | plastic lenses | 34-1.19 | The advantages of plastic lenses. |
| 6A65.70 | Frensel lens | PIRA 1000 | |
| 6A65.70 | Fresnel lens history | AJP 57(4),312 | An article on the discovery of stepped lenses. |
| 6A65.70 | Fresnel lens | Disc 22-19 | Fresnel lens magnification. Animation showing construction of a Fresnel lens. |