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United States Patent | 3,617,135 |
Betz | November 2, 1971 |
A method and arrangement for optical alignment of spatially separated objects in which a laser beam of substantially coherent radiation has disposed therein a phase plate producing a minimum of intensity, a diffraction diaphragm representing the object to be aligned and an observation screen on which appear the characteristics of the diffraction pattern produced by the diaphragm. Photoelectric scanning elements may be arranged in the plane of said observation screen for detecting said diffraction pattern.
Inventors: | Betz; Hans Dieter (Mannheim, DT) |
Assignee: |
Carl Zeiss-Stiftung
(Heidenheim on the Brenz, Wuerttemberg,
DT)
|
Appl. No.: | 04/728,208 |
Filed: | May 10, 1968 |
Feb 20, 1968 [DT] | B 96728 | |||
Current U.S. Class: | 356/400 ; 359/566 |
Current International Class: | G01B 11/26 (20060101); G01B 11/27 (20060101); G01B 11/08 (20060101); G01C 1/00 (20060101); B23Q 23/00 (20060101); G06K 9/32 (20060101); H01S 3/00 (20060101); G01b 011/26 () |
Field of Search: | 356/172,110,111 350/162,163 |
3240108 | March 1966 | Lehan et al. |