Spectrophotometer having functions of both a double-monochromate

Details Spectrophotometer having functions of both a double-monochromate Spectrophotometer having functions of both a double-monochromate

1989-09-20

1991-01-01

Evans, F. L.

Optics: measuring and testing

By dispersed light spectroscopy

Utilizing a spectrophotometer

356333, G01J 318, G01J 342

Patent

active

049813579

ABSTRACT:
A spectrophotometer having functions of both of a double-monochromator and a single-monochromator including a light source, a first spectroscope having a first slit through which light from the light source passes and a first dispersion element for dispersing the light from the first slit, a second spectroscope having a second slit for receiving light dispersed from the first dispersion element for dispersing the light from the second slit, and a third slit for receiving the light dispersed from the second dispersion element. A sample compartment is provided for transmitting the light from the first dispersion element or from the third slit directly to a detector or through a sample to the detector. An optical unit is provided for changing transmitting light paths between a first light path for transmitting the light from the first dispersion element to the sample compartment through a fourth slit and a second light path for transmitting the light from the third slit to the sample compartment. A length of a light path from the first dispersion element to the second slit is equal to a length of a light path from the first dispersion element to the fourth slit.

REFERENCES:
patent: 3730626 (1973-05-01), Cruvellier et al.
patent: 3927944 (1975-12-01), Iwahashi et al.
patent: 4227079 (1980-10-01), Dukes et al.
patent: 4468121 (1984-08-01), Koizumi et al.

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