Diffuse on-axis light source

Details Diffuse on-axis light source Diffuse on-axis light source

1991-08-27

1993-02-16

Henry, Jon W.

Optical: systems and elements

Diffusing of incident light

359389, 359614, 359613, 358101, 358225, G02B 502, G02B 2714

Patent

active

051876116

ABSTRACT:
A light source suitable for illuminating work pieces imaged by machine vision cameras. A beam splitter mirror is located within the camera optical axis, a uniform intensity light source provides light to a diffuser and the diffused light is reflected from the beam splitter to uniformly illuminate the object being observed by the camera with a minimum of stray reflections or glare. Stray and incidental light is absorbed by a light trap located in opposed relation to the diffuser.

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patent: 4991947 (1991-02-01), Sander et al.
patent: 5011265 (1991-04-01), Tamamura et al.

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