Optical assembly for generating light beams accurately at...

Details Optical assembly for generating light beams accurately at... Optical assembly for generating light beams accurately at...

G - Physics

02

B

33/53, 88/98, 88

G02B 27/10 (2006.01) G01B 11/275 (2006.01) G01C 15/00 (2006.01) G02B 5/04 (2006.01) G02B 17/00 (2006.01)

Patent

CA 1067323

ABSTRACT OF THE DISCLOSURE An optical assembly is provided which comprises a light source, preferably a laser, and a particularly compensated prism unit, the la- ser and the prism unit being mounted on a common holder or base. The beam emitted from the laser is reflected 90° by the prism unit, and although this unit is only approximately aligned with the laser the reflected beam will always form a right angle to the incident beam with an extreme accuracy, the deviation from 90° being less than half an angular minute. The accuracy in reflexion independently of prism unit setting is attributed to the compensated prism unit, which com- prises a quadrangular prism composed of two semi-quadrangular prisms. a reflecting surface being mounted, preferably in an adjustable posi- tion, adjacent one side of the prism.

257436

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