Apparatus for testing light transmission through lens

Details Apparatus for testing light transmission through lens Apparatus for testing light transmission through lens

2007-10-10

2009-10-06

Chowdhury, Tarifur (Department: 2886)

Optics: measuring and testing

Lens or reflective image former testing

C356S236000

Reexamination Certificate

active

07599049

ABSTRACT:
An apparatus for testing transmission of a lens includes a light source, a focusing device, an integrating sphere, a moveable carrier, a detector, and a processor. Light, in a specific wavelength range, is emitted from the light source. The focusing device is configured for collimating and focusing the light to transmit the light onto the lens being tested. The integrating sphere is configured for receiving light transmitted through the lens. The moveable carrier is configured for facilitating a relative movement between the lens and the integrating sphere. The detector includes a light sensor configured for detecting a light intensity received by the integrating sphere and transforming the light intensity into a comparing signal for comparison. The processor is configured for comparing a signal of the intensity of the light transmitted to the lens with the comparing signal to obtain a transmission efficiency/percentage of the lens.

REFERENCES:
patent: 4120582 (1978-10-01), De Vries et al.
patent: 7256881 (2007-08-01), Leppard et al.
patent: 2001/0013572 (2001-08-01), Kuderer
patent: 1092167 (1994-09-01), None
patent: 1560585 (2005-01-01), None

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