Precision Fresnel Biprism Interference Apparatus by Klinger Scientific 

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• Perform Fresnel's Biprism Experiment on a 1m optical bench
• Precision optics allow fringe position measurements to 1/100mm
• Easy alignment and adjustment of the two virtual light sources

Fresnel's Biprism Experiment is the fundamental example of common path interference by division of wavefront. Light from a slit passes through side-by-side prisms with very shallow angles to separate it into two almost parallel beams. When these beams are brought to overlapping by a convex lens, they interact as if they originated from two virtual sources side by side and generate equally-spaced fringes. The original version of the experiment by Fresnel is difficult to perform because it requires precise adjustment of the slit and prisms, a dark room, and a large amount of space to separate the fringes for easy viewing.

Contents: 1.

Optical Bench, 1000mm - 1

2. Riders, Lateral Adjustment - 2 

3. Riders, Plain  -  2

4. Sodium Lamp, 20W, 110V -1

5. Adjustable Slit - 1

6. Biprism Carrier, Adjustable -1

7. Lens Carrier, Plain - 1

8. Eyepiece Carrier, Adjustable -1

9. Micrometer Eyepiece - 1

10. Ground Glass Screen -  1

11. Eyepiece Adapter Ring -1

12. Height Fixing Collar -3

13. Biprism - 1

14. Lens, f = +150mm -1

 INSTRUCTIONS FOR USE CLICK HERE