L6-56: FRESNEL SPOTLIGHT
- ID Code: L6-56
- Purpose: Illustrate how Fresnel lenses are used in theatre spotlights.
- Description: The lens of this spotlight has a very short focal length, yet is quite thin and light because it is a Fresnel lens. The bulb in the spotlight can be moved along the optic axis to change the size of the area lit by the spotlight.
- Availability: Available
- References: http://lecdem.physics.umd.edu/images/refs/refsl.htm#L6-56