Optical slit

Details Optical slit Optical slit

2007-01-30

2007-01-30

Lauchman, Layla G. (Department: 2877)

Optics: measuring and testing

By dispersed light spectroscopy

C356S332000, C359S232000

Reexamination Certificate

active

10474182

ABSTRACT:
An optical slit comprises two blades40,42which define a slit between them, each blade being independently movable. This enables both the slit position and the slit width to be adjusted. The slit may be aligned with the center of a light beam by aiming the light beam at a detector, traversing at least one edge of the slit across the beam path, measuring the intensity of transmitted light at the detector for each position of the slit, and feeding back a signal which adjusts the slit position for maximum light throughput. The width on the optical slit may be selected by placing the slit in the path of the light beam and measuring the light transmitted at the detector, calculating the percentage of light transmitted for that slit width and feeding back a signal which adjusts slit width to obtain the desired amount of light throughput.

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