Patents by Inventor John G. Lehman

John G. Lehman 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).

  • Moiré deflectometer including non-mechanical, transparent, spatial light modulators for demonstrating two-axis rulings
    Patent number: 7119911
    Abstract: A Moiré deflectometer includes at least three non-mechanical, transparent, spatial light modulators for demonstrating two sets of patterns on two parallel planes on two of the modulators thereby creating a Moiré fringe pattern and a method for using the same. More particularly, each of the spatial light modulators may be a liquid crystal display, an electrochromic device, a micromirror array, a microlouvre array, an electro-optic device, or a holographic device.
    Type: Grant
    Filed: March 7, 2003
    Date of Patent: October 10, 2006
    Assignee: LSA, Inc.
    Inventors: Dale R. Tyczka, John G. Lehman, Jr., Alvin B. Cabato, Daniel Stern
  • Periscopic optical training system for operators of vehicles
    Patent number: 7056119
    Abstract: A periscopic optical training system for displaying simulation and real images includes a microprocessor for generating at least one simulation image, at least one display for displaying the simulation image, at least one periscopic device each with a viewing window for receiving the simulation and real images, and a controller for controlling the simulation and real images to be received by the periscopic device interchangeably or simultaneously.
    Type: Grant
    Filed: November 27, 2002
    Date of Patent: June 6, 2006
    Assignee: LSA, Inc.
    Inventors: Alvin B. Cabato, David Warner, Dale R. Tyczka, John G. Lehman, Jr.
  • Moire deflectometer including non-mechanical transparent, spatial light modulators for demonstrating two-axis rulings
    Publication number: 20040174539
    Abstract: A Moiré deflectometer includes at least three non-mechanical, transparent, spatial light modulators for demonstrating two sets of patterns on two parallel planes on two of the modulators thereby creating a moiré fringe pattern and a method for using the same. More particularly, each of the spatial light modulators may be a liquid crystal display, an electrochromic device, a micromirror array, a microlouvre array, an electro-optic device, or a holographic device.
    Type: Application
    Filed: March 7, 2003
    Publication date: September 9, 2004
    Applicant: LSA, Inc.
    Inventors: Dale R. Tyczka, John G. Lehman, Alvin B. Cabato
  • Periscopic optical in-situ training system and method for using the same
    Publication number: 20030129567
    Abstract: An in situ training system for displaying simulation and/or real images includes a microprocessor for generating at least one simulation image, at least one display for displaying said simulation image, at least one periscopic device each with a viewing window for receiving the simulation and/or real images, and a controller for controlling the simulation and real images to be received by said periscopic device interchangeably or simultaneously.
    Type: Application
    Filed: November 27, 2002
    Publication date: July 10, 2003
    Applicant: LSA, Inc.
    Inventors: Alvin B. Cabato, David Warner, Dale R. Tyczka, John G. Lehman
  • MWIR polarizing beamsplitter cube and method of making the same
    Patent number: 6212014
    Abstract: A polarizing beamsplitter cube, such as for midwave infrared spectral applications, comprises two ZnSe 45° prisms, an adhesion layer and a thin-film polarization coating layer that are deposited onto the hypotenuse of the first prism, a refractive index liquid layer that provides an interface between the prisms that defeats total internal reflection when the prisms are joined together, and a urethane adhesive that permanently seals and encapsulates the liquid. The adhesion layer consists of 100 Å thorium fluoride and 50 Å chromium layers. The polarization coating (PC) comprises alternating layers of zinc sulfide (ZnS) and germanium (Ge) which are deposited by vapor deposition.
    Type: Grant
    Filed: September 29, 1998
    Date of Patent: April 3, 2001
    Assignee: LSA, Inc.
    Inventors: John G. Lehman, Jr., J. Michael Finlan, Kevin M. Flood, Mary E. Gerard