Patent ID: 6043893
Filing Date: 2000-03-28
Classification: G01J

Abstract:
A manually portable classroom reflectance spectrometer, for hand-held classroom use by students, whereby the reflectance of electromagnetic radiations of multiple wavelengths of targets may be visualized, comprising:a) a topmost compartment (110), said compartment defining a display aperture (120) and containing an adjacent LCD display module (122); a printed circuit board (130) on an obverse side of the compartment (110); said circuit board supporting a circular array of plural LEDs (132), (132'), at least one LED (132') comprising an infrared light; a photodiode light sensor (134) disposed centrally of the LED array, said photodiode being sheathed in an opaque cylinder that extends beyond the end of the photodiode; an externally disposed color coded switch keypad (140);b) a bottommost compartment (150) removably secured to said topmost compartment; a light access aperture (170) on an obverse surface of compartment (150), respective dispositions of the array (132), (132') and the light access aperture being in coactive alignment;c) coactive electronic components comprising a battery power supply (210), integrated colored lamp circuitry (220) with light detection circuit (230) and switch means therefor, said electronic components being coactively retained by topmost and bottommost compartments (110) and (150).