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Optical & Optics
Class Information
Number:
356/228
Name:
Optics: measuring and testing
>
Photometers
>
Photoelectric
>
With particular indicator
> Movable scale (e.g., calibrating)
Description:
Subject matter wherein a scale of the meter or indicating device is movable or adjustable as for calculating purposes.
Patents under this class:
Patent Number
Title Of Patent
Date Issued
7532319
Apparatus for calibrating displacement of reflective parts in diffractive optical modulator
May. 12, 2009
6842711
Power calibration system
Jan. 11, 2005
5684596
Method and apparatus for measuring axial and torsional loads on a valve stem
Nov. 4, 1997
5610709
Automatic ranging optical power monitoring system
Mar. 11, 1997
4644341
Contrast indicating arrangement in photoelectric sensing systems
Feb. 17, 1987
4488812
Photometric apparatus
Dec. 18, 1984
4405199
Method for enhancing signals transmitted over optical fibers
Sep. 20, 1983
3990799
Digital exposure meter
Nov. 9, 1976
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