Spectrophotometer

Details Spectrophotometer Spectrophotometer

1976-07-12

1978-05-30

Corbin, John K.

Optics: measuring and testing

Range or remote distance finding

With photodetection

250214AG, 356179, 356205, G01V 342, H01V 3912

Patent

active

040920690

ABSTRACT:
A spectrophotometer comprising means for producing electrical signals Er and Es corresponding to reference and measuring beams, respectively; means for multiplying the value Es by a factor k to produce an electrical signal corresponding to the value kEs; means for controlling said signal producing means so as to keep the value (Er + kEs) constant; and means for producing an electrical signal corresponding to the value (Er - kEs), whereby minute changes of the absorbance of a sample can be accurately measured without logarithmic conversion.

REFERENCES:
patent: 3623817 (1971-11-01), Celio
patent: 3972617 (1976-08-01), Shibata et al.

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