Optical alignment means utilizing inverse projection of a test p

Details Optical alignment means utilizing inverse projection of a test p Optical alignment means utilizing inverse projection of a test p

1993-08-02

1994-05-10

Porta, David P.

X-ray or gamma ray systems or devices

Accessory

Alignment

378206, 378 19, 250214VT, H05G 164

Patent

active

053115686

ABSTRACT:
An imaging system comprised of a source of penetrative radiation 14, an image intensifier tube 18 and a video camera 38 is provided. The intensifier tube is comprised of a input screen 22 and an output screen 24. The intensifier tube converts radiation 20 impinging on the input screen into a visible light image 36 on the output screen 24. The video camera is operatively positioned to view the output screen of the intensifier. A light sampler 50 is operatively disposed in the visible light path between the image intensifier output screen 24 and the video camera input 38. The light sampler is comprised of a mirror 52, a focusing lens 54, a beam splitter 56, an aperture 58, a light source 78, a photo receptor 60 and an optical aligner 64. The optical aligner fixes the first mirror 52, the focusing lens 54, the half-mirror 56, the aperture 58, the light source 62 and the photo receptor 60 in optical alignment such that light originating on the output screen and received by the mirror 52 is directed to focusing lens 54 and to beam splitter 56. A portion of the light striking beam splitter 56 is reflected thereby and passes through aperture 58 and strikes photo receptor 60. Light originating from the light source 62 is directed to half-mirror 56 and passes therethrough to lens 54, to mirror 52 and to the output screen 22.

REFERENCES:
patent: 5029338 (1991-07-01), Aichinger et al.
patent: 5194726 (1993-03-01), Jonkman
patent: 5218626 (1993-06-01), McKee

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