Kollmorgen Corporation

Killmorgen Corporation

Alan G Kravetz

Harold R Van Aken

Kenneth Garde

William L Weber

Joseph Corrado

A handheld portable spectrophotometer is provided including keys for input of instructions by a user, an illuminator for illuminating a sample, and a spectral analyzer for separating light reflected from the sample into spectral components to produce a signal corresponding to the level of each spectral component. A processor is provided for executing the user instructions and for analyzing the signal. The results of the signal analysis are presented on a display. A power source is provided for providing power for operation of the handheld portable spectrophotometer.

Spectrophotometer and radiometric measurement apparatus

Handheld portable spectrophotometer

Portable spectrophotometer

A method and apparatus for stabilizing the gain of a self scanned photo-diode array is provided for use with spectrophotometers and other light measurement equipment. A gain stabilizer light emitting diode (LED) constantly illuminates the array so that photons are continuously impinging upon the self-scanned photo-diode array. In the course of a typical measurement sequence, an illuminated scan is first taken, wherein said photo-diode array is illuminated by LED and the light being analyzed, followed by a dark reading wherein the photo diode array is illuminated by the LED only. The dark reading measurement is then subtracted from the illuminated reading to derive an accurate reading of the light being analyzed.

Gain stabilized self-scanning photo-diode array

A color reference standard and method of making same are disclosed. A transparent film having a matte surface and a spectral optical modulator are selected. The spectral optical modulator, preferably a glossy pigment, is coated onto the film surface opposite the matte surface, as by painting, hand drawn down, or silk screen application. So configured, the color reference standard provides a matte color reference standard when the glossy pigment coating is viewed through the matte film surface and a glossy reference standard when the glossy pigment is viewed directly from the opposite side of the reference standard. Advantageously, both the matte and glossy reference surfaces are cleanable without altering the reflectance values of the color standard.

Durable working matte/glossy color standard and method of making same

Growing community of inventors

New Windsor, NY, United States of America

Alan G Kravetz