1 August 1980 Unique Optical System For Conversion Of Existing Photometers Into Scanning Microphotometers
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Abstract
There are many thousands of luminance photometers in the field, both telephotometers and microphotometers; however, very few of these have scanning microphotometric capability. This paper describes a unique optical system that can be field-interchanged with the standard objective lens, without requiring any modification of the photometer's internal optical system, to convert an existing photometer into a high-resolution scanning microphotometer. One embodiment, called the MicroScanner Spatial Scanner, will be described in detail. Used with any standard Pritchard Photometer, this scanner provides variable-speed scanning of a half-inch (12 mm) of object space with field coverage as fine as 0.0001 in. (0.0025 mm) or as broad as 0.39 in. (10 mm). The system features photometric uniformity within ±0.5% over the entire scan distance, freedom from polarization error, and a half-inch scan distance independent of choice of objective lens.
Thomas H. Bulpitt, Richard A. Walker, "Unique Optical System For Conversion Of Existing Photometers Into Scanning Microphotometers," Optical Engineering 19(4), 194561 (1 August 1980). https://doi.org/10.1117/12.7972559 . Submission:
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