Patents by Inventor Benjamin H. Cook, Jr.

Benjamin H. Cook, Jr. has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Pressure regulation system for gas laser based on temperature of anode stem
    Patent number: 5117435
    Abstract: A gas laser includes a housing containing a lasing gas. Means are provided for electrically exciting the gas including a cathode mounted at one end of the housing and an anode mounted at the other end. The temperature of the anode is monitored and a control signal is generated which is indicative of the temperature that is measured. An automatic gas supply apparatus is activated to vary the gas pressure in the housing in response to the control signal. Additionally, the temperature that is measured may be normalized to counteract the effects of the ambient temperature of the anode.
    Type: Grant
    Filed: October 25, 1990
    Date of Patent: May 26, 1992
    Assignee: Coherent, Inc.
    Inventors: Benjamin H. Cook, Jr., William P. Kolb
  • Laser resonator mirror with wavelength selective coatings on two surfaces
    Patent number: 5101415
    Abstract: An improved laser mirror (22) is disclosed with wavelength selective coatings on the inner and outer surfaces (32) and (34) thereof. The coating on the inner surface (32) is reflective of light in a first wavelength region (36) and transmissive of light in a second wavelength region (38). The outer surface (34) is reflective of light in the second wavelength region ( 38). In the preferred embodiment, one of the surfaces of the mirror is planar and the other is curved to facilitate alignment. The different curvatures of the inner and outer surfaces allows the diameter of the beam of the two wavelength regions to be independently controlled allowing optimization of the mode generated by the laser (20).
    Type: Grant
    Filed: September 14, 1990
    Date of Patent: March 31, 1992
    Assignee: Coherent, Inc.
    Inventors: William P. Kolb, Benjamin H. Cook, Jr.
  • Apparatus and method for suppressing diffraction rings in a laser
    Patent number: 4873693
    Abstract: A laser comprises an interaction region formed by a wall surface of a capillary discharge tube which has been roughened along a continuous length thereof. This roughened surface suppresses and substantially eliminates diffraction rings in lasers.
    Type: Grant
    Filed: November 30, 1988
    Date of Patent: October 10, 1989
    Assignee: Melles Griot San Marcos Company
    Inventor: Benjamin H. Cook, Jr.
  • Apparatus and method for suppressing diffraction rings in a laser
    Patent number: 4827484
    Abstract: A laser comprises an interaction region formed by a wall surface of a capillary discharge tube which has been roughened along a continuous length thereof. This roughened surface suppresses and substantially eliminates diffraction rings in lasers.
    Type: Grant
    Filed: October 14, 1987
    Date of Patent: May 2, 1989
    Assignee: Melles Griot San Marcos Company
    Inventor: Benjamin H. Cook, Jr.