Reflective optical system for a microscopic spectrometer

Details Reflective optical system for a microscopic spectrometer Reflective optical system for a microscopic spectrometer

1990-10-31

1992-08-04

Henry, Jon W.

Optical: systems and elements

Compound lens system

With curved reflective imaging element

359351, G02B 1706, G02B 2306

Patent

active

051364220

ABSTRACT:
An optical system for a microscopic spectrometer includes an objective, an inverse placed telescope for relaying the image formed by the objective towards a detecting element, and an optical element for focusing the relayed image onto the detecting element. In the preferred embodiments, the inverse placed telescope is disposed after the image plane of a Cassegrain objective, and a paraboloid mirror collects the relayed light from the inverse placed telescope to be focused into an image on the detecting element. The inverse placed telescope has a smaller shading coefficient than the Cassegrain objective, and the size of the image of the pupil of the Cassegrain objective is smaller than the diameter of the secondary mirror of the inverse placed telescope. The image of the shaded diameter in the preferred embodiment, which is caused by the secondary mirror of the Cassegrain objective, is greater than the shading diameter caused by the inverse placed telescope itself.

REFERENCES:
patent: 2212211 (1940-08-01), Pfund
patent: 2995973 (1961-08-01), Barnes et al.
patent: 3040176 (1962-06-01), Rempka et al.
patent: 4101195 (1978-07-01), Korsch
patent: 4594509 (1986-06-01), Simon et al.
patent: 4716293 (1987-12-01), Harrick
patent: 4852955 (1989-08-01), Doyle et al.
patent: 4922104 (1990-05-01), Eguchi et al.

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