The Problem Of Optical Theory In Differentia Inspection Of Optics

Han Sen

doi:10.1117/12.978560

1 January 1987 The Problem Of Optical Theory In Differential Inspection Of Optics

Han Sen

Proceedings Volume 0818, Current Developments in Optical Engineering II; (1987) https://doi.org/10.1117/12.978560
Event: 31st Annual Technical Symposium on Optical and Optoelectronic Applied Sciences and Engineering, 1987, San Diego, CA, United States

Abstract

In this article, according to diffractive theory, the author discusses the problem of optical theory in differential inspection by optics, that is , the change of the shape of light aperture and the change of the size and selection of the position of the field stop of the optical system in the Infrared Dynamic Automation sorting Instrument for example, and deduces and calculates the exact spatial spread formulas and their approximate formulas for calculating the energy of a photoelectric receiver for light apertures of different shapes, and analyzes the influence of the change of the size and the selection of the position of the field stop on inspection accuracy. The differential inspection method by optics has rarticulr advantages over other methods. This inspection is based on the output intersection signal due to two beams, and thus various interference factors have the same influence on the two beams, therefore inspection errors are greatly reduced. We take an example--Infrared Dynamic Automation Sorting instrument. This instrument also has high brightness and low threshold, adapting itself to production circumstance. Its wavelength is in the infrared field.

Citation Download Citation

Han Sen "The Problem Of Optical Theory In Differential Inspection Of Optics", Proc. SPIE 0818, Current Developments in Optical Engineering II, (1 January 1987); https://doi.org/10.1117/12.978560

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KEYWORDS

Inspection

Sensors

Optical inspection

Infrared radiation

Receivers

Diffraction

Shape analysis

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