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Program Controlled High Speed Camera

IP.com Disclosure Number: IPCOM000093496D
Original Publication Date: 1967-Oct-01
Included in the Prior Art Database: 2005-Mar-06
Document File: 2 page(s) / 38K

Publishing Venue

IBM

Related People

Erhard, M: AUTHOR [+3]

Abstract

An image of object 1 is projected by lenses 2 and 20 through electro-optic shutter 3 and the electro-optic deflecting stages 4...7 onto one area 18 of light-sensitive film 19. Vertical light deflector stage 4 and horizontal light deflector stage 5 comprise electro-optic rotators 4a and 5a. These controllably rotate the plane of polarization of the linearly polarized light leaving analyzer 3a of shutter 3 and birefrigent crystals 4b and 5b. Stages 6 and 7 comprise electro-optic rotators 6a and 7a, Brewster mirrors 6b and 7b and mirrors 6c and 7c.

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Program Controlled High Speed Camera

An image of object 1 is projected by lenses 2 and 20 through electro-optic shutter 3 and the electro-optic deflecting stages 4...7 onto one area 18 of light- sensitive film 19. Vertical light deflector stage 4 and horizontal light deflector stage 5 comprise electro-optic rotators 4a and 5a. These controllably rotate the plane of polarization of the linearly polarized light leaving analyzer 3a of shutter 3 and birefrigent crystals 4b and 5b. Stages 6 and 7 comprise electro-optic rotators 6a and 7a, Brewster mirrors 6b and 7b and mirrors 6c and 7c.

If no rotator 4a, 5a, 6a, and 7a is energized, the plane of polarization of the light coming from analyzer 3a is not rotated and passes undeflected through all deflection stages. If rotator 4a is energized by devices not shown, the plane of polarization of the light emanating from analyzer 3a is rotated by 90 degrees. Thus it passes through crystals 4b and 5b as an extraordinary beam which is deflected upwards and sidewards to the path represented by dotted lines. The light is further reflected by mirrors 6b, 6c, 7b, and 7c and an image of object 1 is formed on area 18 of film 19 as shown.

If the plane of polarization of the light leaving crystal 4b is rotated back to its original angular position by rotator 5a, it passes through the system without being deflected by crystal 5b or by one mirror 6b, 6c, 7b or 7c.

By energizing different combinations of rotators 4a, 5a, 6a or 7a, the im...