초록 ▼

A handheld device for infrared reflectance measurements of samples for identification of the sample materials is a self-contained portable unit built into a handheld housing. The housing includes a window and optics on a bench adjacent the window, so that the optics will be aligned with the sample w

A handheld device for infrared reflectance measurements of samples for identification of the sample materials is a self-contained portable unit built into a handheld housing. The housing includes a window and optics on a bench adjacent the window, so that the optics will be aligned with the sample when the device is placed directly against the sample. The optics include a broad-band IR light source (ordinary lamp) shining onto an acousto-optic tunable filter (AOTF), which passes narrow-band IR light with a swept frequency; a lens focussing the IR through the window onto the sample; and a reflectance detector aligned with the window of the housing to pick up reflected light. A computer, which may be mounted in the housing, compares the detected reflectance spectrum with stored sample data spectra, and identifies the material or the components of the material and their proportions. Inclusion of all the parts inside the housing allows the device to be portable; this is made possible by the alignment of the lamp, AOTF filter, lens, window, and detector, which has high optical efficiency, and by elimination of optical fibers.

대표청구항 ▼

[ What is claimed is:] [1.] A handheld device for light reflectance measurements of samples, the device comprising:a housing including a window through a housing wall;a reflectance detector aligned with the window of the housing;an acousto-optic tunable filter (AOTF);a light source;means for generat

[ What is claimed is:] [1.] A handheld device for light reflectance measurements of samples, the device comprising:a housing including a window through a housing wall;a reflectance detector aligned with the window of the housing;an acousto-optic tunable filter (AOTF);a light source;means for generating a light beam, having a swept wavelength, from the light source and the tunable filter;alignment means for optically aligning the beam with the window and emitting the beam therefrom; andelectric circuit means for accepting an electric signal from the detector;wherein the reflectance detector, the filter, the light source, the means for generating, and the alignment means are disposed inside the housing.