Thursday, 19 June 2014 17:23

## L6-11: OPTICAL BOARD - DEPTH OF FIELD

• ID Code: L6-11
• Purpose: Illustrate the idea of depth of field of a (camera) lens, and to locate the near and far points.
• Description: The beams passing through lenses 1 and 2 are focussed to produce an object for lens 3, the "camera" lens, which is imaged on a distant screen at the right as a straight line. Adjust the screen position so that the image is as sharp as possible, and mark the object point on the optical board with black tape. By moving lens 2, the position of the object is changed, eventually causing the image to become blurred. Mark the near and far points on the board for an acceptably clear image line. The result as obtained here is somewhat arbitrary, but in fact there is a mathematical definition for what constitutes a sharp image.
• Availability: Available
• #### L6-01: OPTICAL BOARD - CONVERGING SPHERICAL LENS

Show focusing of a spherical (cylindrical) convex lens Read More
• #### L6-02: OPTICAL BOARD - CIRCULAR SLAB

Show focusing of a circular lens Read More
• #### L6-03: OPTICAL BOARD - HYPERBOLIC LENS

Show focusing of a hyperbolic lens Read More
• #### L6-04: OPTICAL BOARD - RAY DIAGRAM - REAL IMAGE POS LENS

Use principal rays to locate a real image produced by a convex lens Read More
• #### L6-05: OPTICAL BOARD - RAY DIAGRAM - VIRTUAL IMAGE POS LENS

Demonstrate that a lens focuses light Read More
• #### L6-06: MULTIPLE PINHOLES AND LENS RECOMBINATION

Demonstrate that a lens focuses light Read More
• #### L6-07: MICROWAVES - LENS

Demonstrate that a paraffin lens can focus microwaves Read More
• #### L6-08: REAL IMAGE OF CONVERGING LENS - LIGHT BULB

Show the real image of a converging lens Read More
• #### L6-09: REAL IMAGE OF CONVERGING LENS

Show the systematics of real image formation by a converging lens Read More
• #### L6-10: IMAGE LOCATION WITH TV CAMERA - LENS

Locate both real and virtual images of a convex lens Read More
• #### L6-11: OPTICAL BOARD - DEPTH OF FIELD

Illustrate the idea of depth of field of a (camera) lens, and to locate the near and far points Read More
• #### L6-12 MAGNIFYING LENS IN WATER

Shows that focal properties of a lens depend on the medium in which the lens is located Read More
• #### L6-13: OPTICAL BOARD - PARALLEL RAY FOCUS

Demonstrate focusing of parallel rays in a counterintuitive way Read More
• #### L6-14: IMAGE OF CONVEX LENS - WITH AND WITHOUT BAFFLE

Encourage thought regarding how an image is formed Read More
• #### L6-21: OPTICAL BOARD - DIVERGING SPHERICAL LENS

Determine the focal point of a concave lens Read More
• #### L6-22: OPTICAL BOARD - RAY DIAGRAM - VIRTUAL IMAGE NEG LENS

Use the three principal rays to locate the virtual image of a diverging lens Read More
• #### L6-31: STRING MODEL - SPHERICAL ABERRATION

Illustrate light rays for spherical aberration Read More
• #### L6-32: OPTICAL BOARD - SPHERICAL ABERRATION IN LENS

Demonstrate spherical aberration using rays Read More
• #### L6-33: STRING MODEL - CHROMATIC ABERRATION

Illustrate rays for chromatic aberration Read More
• #### L6-34: OPTICAL BOARD - CHROMATIC ABERRATION IN LENS

Show chromatic aberration in a convex lens Read More
• #### L6-35: CHROMATIC ABERRATION - POINT SOURCE AND 20 CM LENS

Show the effect of chromatic aberration in a lens Read More
• #### L6-36: STRING MODEL - ASTIGMATISM

Illustrate rays for on-axis astigmatism Read More
• #### L6-37: ASTIGMATISM

Demonstrate off-axis astigmatism with a spherical lens. Read More

• #### L6-39: DISTORTION - PINCUSHION AND BARREL WITH 2 IRISES

Show pincushion and barrel distortion Read More
• #### L6-40: DISTORTION - PINCUSHION AND BARREL

Fast and simple way to show pincushion and barrel distortion Read More
• #### L6-41: DISTORTED IMAGE - PINCUSHION AND BARREL

A slightly more complicated but better way to show pincushion and barrel distortion Read More
• #### L6-42: DISTORTION AND CORRECTION

Illustrate pincushion and barrel distortion and correction thereof Read More
• #### L6-43: DISTORTED PERSPECTIVE

Distortion by a simple lens Read More
• #### L6-51: OPTICAL BOARD - FRESNEL LENS

Demonstrate construction of a Fresnel lens Read More
• #### L6-52: FRESNEL LENSES - MISCELLANEOUS

To allow individual experience with plastic Fresnel lenses Read More
• #### L6-53: FRESNEL LENS MAGNIFIER

Demonstrate magnification by a thin plastic Fresnel lens Read More
• #### L6-54: OPTICALLY PROGRAMMED TRAFFIC SIGNAL - MODEL

Illustrate the optics of an optically programmed traffic signal Read More
• #### L6-55: FRESNEL FLASHLIGHT

Show an application of the Fresnel lens Read More
• #### L6-56: FRESNEL SPOTLIGHT

Illustrate how Fresnel lenses are used in theater spotlights Read More
• #### L6-71: OPTICAL DISC

Demonstrate a number of ray optics phenomena Read More
• #### L6-91: ANAMORPHIC LENS

Show application of anamorphic lenses to wide-screen movies Read More
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