Search

Alan M Title

from Palo Alto, CA
Age ~86

Alan Title Phones & Addresses

  • 607 Marion Pl, Palo Alto, CA 94301
  • Tucson, AZ

Public records

Vehicle Records

Alan Title

View page
Address:
607 Marion Pl, Palo Alto, CA 94301
Phone:
(650) 424-4034
VIN:
WBAWL73547PX49514
Make:
BMW
Model:
335
Year:
2007

Publications

Us Patents

Infrared Polarizing Beamsplitter

View page
US Patent:
47339268, Mar 29, 1988
Filed:
Nov 10, 1986
Appl. No.:
6/929114
Inventors:
Alan Title - Palo Alto CA
Assignee:
Lockheed Missiles & Space Company, Inc. - Sunnyvale CA
International Classification:
G02B 530
US Classification:
350 11
Abstract:
A polarizing cube beamsplitter, which is designed for infrared applications, comprises two 45. degree. prisms made of ZnSe. A first anti-reflection layer, which is a Herpin equivalent layer consisting of the triad of sublayers ZnS-ZnSe-Zns, is deposited onto the hypotenuse of a first one of the prisms. Then, a polarizing stack consisting of a plurality of pairs of thin-film layers of alternating high and low refractive indices is formed on the first anti-reflection layer. One layer in each pair of thin-film layers in the polarizing stack is a Herpin equivalent layer consisting of the triad of sub-layers Te-ZnSe-Te, and the other layer in each pair is a thin film of ZnSe. A layer of prism material ZnSe, which is thick enough to be optically polished, is then formed on the second anti-reflection layer. The hypotenuse of the second prism is likewise optically polished, and is pressed onto the optically polished layer of prism material to form a bond. The resulting beamsplitter is of cubic configuration.

Partial Polarizer Filter

View page
US Patent:
41293576, Dec 12, 1978
Filed:
Aug 11, 1977
Appl. No.:
5/823566
Inventors:
Robert A. Administrator of the National Aeronautics and Space Frosch
Alan M. Title - Palo Alto CA
International Classification:
G02B 102
G02B 520
US Classification:
350157
Abstract:
A birefringent filter module comprises, in seriatum, an entrance polarizer, a first birefringent crystal responsive to optical energy exiting the entrance polarizer, a partial polarizer responsive to optical energy exiting the first polarizer, a second birefringent crystal responsive to optical energy exiting the partial polarizer, and an exit polarizer. The first and second birefringent crystals have fast axes disposed. +-. 45. degree. from the high transmitivity direction of the partial polarizer. Preferably, the second crystal has a length 1/2 that of the first crystal and the high transmitivity direction of the partial polarizer is nine times as great as the low transmitivity direction. To provide tuning, the polarizations of the energy entering the first crystal and leaving the second crystal are varied by either rotating the entrance and exit polarizers, or by sandwiching the entrance and exit polarizers between pairs of half wave plates that are rotated relative to the polarizers. A plurality of the filter modules may be cascaded.

Optical Filter

View page
US Patent:
44075669, Oct 4, 1983
Filed:
Sep 29, 1981
Appl. No.:
6/306691
Inventors:
William J. Rosenberg - Palo Alto CA
Alan M. Title - Palo Alto CA
Assignee:
Lockheed Missiles & Space Co., Inc. - Sunnyvale CA
International Classification:
G02B 528
G02B 530
US Classification:
350404
Abstract:
A filter element for a narrow-passband optical filter comprises a birefringent crystal (10) having a rectangular parallelopiped configuration with an entrance face (11), an exit face (12) and side walls (21, 22, 23, 24). The optic axis (25) of the crystal (10) is parallel to the entrance and exit faces (11 and 12). The side walls (21, 22, 23, 24) are polished to provide total internal reflection of optical energy incident thereon at greater than a critical angle as measured from the normal. By covering the side walls (21, 22, 23, 24) with a coating whose index of refraction is given by the algorithm n=(N. sup. 2 =sin. sup. 2. theta. ). sup. 1/2, where n is the index of refraction of the coating, N is the lower index of refraction of the crystal (10), and. theta. is a half-angle defining the maximum field of view in air for the filter element, the critical angle for total internal reflection is made substantially equal to the half-angle defining the maximum field of view. In this way, vignetting is suppressed and a wide field of view is obtained.
Alan M Title from Palo Alto, CA, age ~86 Get Report