Optical spectrum measuring apparatus

Details Optical spectrum measuring apparatus Optical spectrum measuring apparatus

1996-12-18

1998-07-21

Hantis, K.

Optics: measuring and testing

By dispersed light spectroscopy

Utilizing a spectrometer

G01J 328

Patent

active

057841594

ABSTRACT:
An optical spectrum measuring apparatus is disclosed that is able to take measurements at high speed. An encoder is connected to the rotational axis of a motor. A counter counts the number of pulses outputted from the encoder 14. A comparator, that is connected to the counter and a register, compares a value stored in the counter with a value stored in the register set by a control section, and outputs an AD conversion signal when the values are equal. The control section sets the register with a value corresponding to a first measurement point and rotates a diffraction grating at a constant speed from an angle corresponding to a measurement initiation wavelength to an angle corresponding to a measurement termination wavelength. An AD conversion signal is outputted from the comparator when a measurement point is reached, then the control section sets the register to a value corresponding to the next measurement point.

REFERENCES:
patent: 3822941 (1974-07-01), Roche et al.
patent: 4225233 (1980-09-01), Ogan
patent: 4732476 (1988-03-01), Barshad
patent: 4776695 (1988-10-01), van Pham et al.

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