Robert G Chemelli

40301222, Jun 14, 1977

Jul 28, 1975

5/599850

Robert Guido Chemelli - Morristown NJ
Dwight Dexter Cook - New Providence NJ
Richard Carrel Miller - Summit NJ

Bell Telephone Laboratories, Incorporated - Murray Hill NJ

H04N 576

358127

Disclosed is an apparatus for recording optical information by means of laser machining of holes on a recording medium. The optical components include a solid state laser, means for converting the light emanating from the laser into a circular beam, and an optical fiber with a graded index of refraction for focusing the light onto the recording medium. The components are mounted on a support arm which is deflected at a rate sufficient to achieve line scan of the medium, while frame scan is achieved by translating either the support arm or the film in a direction essentially perpendicular to the plane of deflection. Means may also be included for displaying the printed information on a screen.

39745074, Aug 10, 1976

Sep 29, 1975

5/617531

Robert Guido Chemelli - Morristown NJ
Richard Carrel Miller - Summit NJ

Bell Telephone Laboratories, Incorporated - Murray Hill NJ

G01D 1510
G01D 942
H01S 300
H04N 100

346 76L

In a micrographics system of the type in which holes are machined in a thin film by means of a laser (see, for example, reissue U. S. Pat. No. 28,375 of D. Maydan, M. I. Cohen and R. E. Kerwin, granted Mar. 25, 1975), it is advantageous that the laser be a solid-state unit of the stripe-geometry double-heterostructure type. But the optical output beam of such a laser typically exhibits astigmatism and an elliptical cross-section. To assure high-quality machining of the film, it is important that the astigmatic nature of the beam be corrected and, in addition, that the beam be converted to one having a circular cross-section. As described herein, this is accomplished by means of an inexpensive and easily adjustable compact array of optical components that are relatively insensitive to beam-steering and to certain filamentation effects that may occur in the laser.