EDWARD W NICHOLS
Engineers in Reisterstown, MD

4712914, Dec 15, 1987

Jan 10, 1986

6/817705

Michael A. Cross - Severna Park MD
Edward W. Nichols - Reisterstown MD

Westinghouse Electric Corp. - Pittsburgh PA

G01J 100

356121

A system for characterizing miniature optical sources such as laser diodes is disclosed. In its most convenient form the system includes an optical system for collecting a wide angle beam and collimating the beam into substantially parallel rays. In the substantially parallel beam, equal area angular portions of the wide angle beam should correspond to equal areas in the parallel beam. Optical sensors are utilized to generate signals indicative of the intensity of the parallel optical beam. Digital processing is included to calculate the characteristics of the optical beam from the intensity samples of the parallel beam. In one embodiment, a reflecting plane is positioned between the source and the optical system so that Lloyd's fringes are produced in a measurement plane.

5017004, May 21, 1991

Dec 22, 1988

7/288387

Michael A. Cross - Severna Park MD
Edward W. Nichols - Reisterstown MD

Westinghouse Electric Corp. - Pittsburgh PA

G01J 100

356121

An electro-optical test tool for testing an input laser beam includes a collecting optics system of attenuating and collimating lenses enabling the test tool to test high powered, high PRF laser sources. A processor controlled CCPD sensor array provides a shuttered laser beam video signal which can be processed using a non-linear technique to improve the dynamic range of the system. Additionally, boresight error correcting capabilities are provided as well as range finding techniques.

4693600, Sep 15, 1987

Oct 23, 1986

6/922797

Michael A. Cross - Severna Park MD
Edward W. Nichols - Reisterstown MD

Westinghouse Electric Corp. - Pittsburgh PA

G01J 100

356121

A system for analyzing the characteristics of a light beam is disclosed. Functionally, the system includes an optical system for collecting the light beam to be analyzed. An array of light-sensitive elements is positioned at the focal plane of the optical system. A digital system sequentially samples the output signals of the light sensors and processes the resulting data to generate signals indicative of the characteristics of the light beam.

4746205, May 24, 1988

Jan 30, 1987

7/009842

Michael A. Cross - Severna Park MD
Edward W. Nichols - Reisterstown MD

Westinghouse Electric Corp. - Pittsburgh PA

G02B 700, G02B 2710, G02B 508, G02B 510

350574

An attenuated fiducial replica of the far field pattern of a high energy laser beam is obtained by a system and method wherein a first fraction of an incident high energy beam is deflected from one reflective surface of a holey plate and the diffracted orders of the beam are transmitted from the holes to a concave reflector, which reflects diffracted orders toward an opposite reflective surface of the holey plate. A zinc selenide partially reflective member is disposed on-axis between the rear reflective surface and the concave surface for re-reflecting successive fractional portions of the reflected beam a selected number of times to attenuate the beam converging upon a focal plane from an effective focal distance greater than the physical length of the optical system.