Patents by Inventor Robert G. Messerschmidt

Robert G. Messerschmidt 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).

  • Patent number: 4877960
    Abstract: A universal microscope for use with a commercial FT-IR spectrophotometer comprises a visible light microscope for selecting and masking an area of a sample and an infrared microscope for sampling the masked area. The visible light microscope and the infrared microscope share a common optical path between one or more remote sample image plane masks and the sample plane such that both the visible light and the infrared radiant energy are masked twice to spatially define the same area at the sample plane. The first sample image plane mask removes energy from outside the target area at the sample focus. The second sample image plane mask removes energy from outside the target area that is diffracted by the first mask or the focusing optics. The first remote sample image plane is imaged onto the second remote image plane with the radiant energy gaining spectroscopic information and additional image information by passing through or reflecting off a sample located at the intervening sample plane.
    Type: Grant
    Filed: January 4, 1989
    Date of Patent: October 31, 1989
    Assignee: Spectra-Tech, Inc.
    Inventors: Robert G. Messerschmidt, Donald W. Sting
  • Patent number: 4859064
    Abstract: A spectroscopy system separates the diffuse reflectance component of a reflectance spectrum from the specular reflectance component using a remote field stop filter. The surface of the sample is placed at a focal plane of an optical system. The optical system forms an image on the surface of the sample that includes an image of the remote field stop filter. The optical system images the surface of the sample onto either the same or another remote field stop. Energy reflected from the surface of the sample which is in focus at the remote field stop retains the image information about the image of the filter, whereas energy reflected from below the surface of the sample does not necessarily retain image information about the image of the filter.
    Type: Grant
    Filed: May 9, 1988
    Date of Patent: August 22, 1989
    Assignee: Spectra-Tech, Inc.
    Inventors: Robert G. Messerschmidt, Donald W. Sting
  • Patent number: 4730882
    Abstract: A multiple internal reflectance crystal has a sample surface and a bottom surface and reflective beveled ends such that energy may enter normal to the bottom surface, reflect off one beveled end to the bottom surface, from the bottom surface to the top surface, down the length of the crystal, and exit the crystal normal to the bottom surface by reflecting off of another beveled end. The crystal may be optically linked with light pipes and positioned at a location remote from the source and receiver of energy.
    Type: Grant
    Filed: February 10, 1986
    Date of Patent: March 15, 1988
    Assignee: Spectra-Tech, Inc.
    Inventor: Robert G. Messerschmidt
  • Patent number: 4712912
    Abstract: The optical system of the present invention comtemplates directing a beam of radiant energy to either an aperture beam splitter or polarizing beam splitter. Radiant energy from the beam splitter forms a first remote image at an entrance to an image scrambler so that any image information which the beam contains is destroyed. The output of the scrambler fills the full aperture of a focusing objective that reproduces the image of the output of the scrambler onto a sample. A mask, positioned at a remote image between the output of the scrambler and focusing objective, determines the geometrical shape of the sample image. The focusing objective images the radiant energy that is reflected from the sample to a second remote image at the scrambler so that the scrambler destroys image information while retaining spectroscopic information. The beam splitter reflects a portion of the radiant energy from the scrambler to the detector.
    Type: Grant
    Filed: March 10, 1986
    Date of Patent: December 15, 1987
    Assignee: Spectra-Tech, Inc.
    Inventor: Robert G. Messerschmidt
  • Patent number: 4661706
    Abstract: Diffuse reflectance spectra may be obtained that are free from the distortions caused by specular reflections by using an apparatus and method for physically blocking out specularly reflected energy. The apparatus consists of a blocker that is positioned substantially in contact with the surface of the sample at the region wherein an input beam of energy is focused on the sample. Specularly reflected energy that would otherwise be reflected to a detector is physically blocked by the blocker. That part of the input energy beam that penetrates into the sample is diffusely reflected. Part of the diffusely reflected energy passes under the blocker where it is collected and focused on the detector. The blocker is found to have particular application in the field of infrared spectroscopy of inorganic compounds, particularly compounds having a powdered structure.
    Type: Grant
    Filed: February 25, 1985
    Date of Patent: April 28, 1987
    Assignee: Spectra-Tech Inc.
    Inventors: Robert G. Messerschmidt, Donald W. Sting
  • Patent number: 4653880
    Abstract: A reflecting beam splitting objective employing only three mirrors obtains a high reflective efficiency. In one embodiment, the objective contains a small intercepting mirror between primary and secondary mirrors of a Cassegrain mirror arrangement. The position of the intercepting mirror is determined so that the mirror receives an input beam and directs that beam onto a first portion of the secondary mirror without vignetting the beam when it is reflected from the secondary mirror to a first portion of the primary mirror or by cutting off part of the image transmitted from the second portion of the secondary mirror to a focus behind the primary mirror. The objective may use all energy that is input into the objective to image a sample. The objective has demonstrated particular utility in the field of infrared spectroscopy of small samples.
    Type: Grant
    Filed: March 1, 1985
    Date of Patent: March 31, 1987
    Assignee: Spectra-Tech Inc.
    Inventors: Donald W. Sting, Robert G. Messerschmidt