Optics: measuring and testing – By dispersed light spectroscopy – Utilizing a spectrometer
Patent
1987-12-24
1990-01-02
McGraw, Vincent P.
Optics: measuring and testing
By dispersed light spectroscopy
Utilizing a spectrometer
G01C 1964
Patent
active
048909238
ABSTRACT:
Apparatus, suitable for a laser ring resonator, for superposing of two light beams that interfere at an angle of divergence and form a pattern of interference fringes at an observation location. The apparatus consists of two prism parts that are cemented to one another at a common internal connecting surface. The prism parts have slightly differing base angles. A partial region of the internal connecting surface between the two partial prisms is provided with a partially-transmitting mirror coating. A non-totally-reflecting partial coating on both outer surfaces of the prism parts has a greater refractive index than the internal medium of the prism parts and covers regions of the possible first light incidence points of light beams passing through the partial prisms from specified light entrance points at the base. The two partial prisms cemented to one another are connected, on the base side, to the glass substrate of a mirror for coupling-out light.
REFERENCES:
patent: 3484169 (1969-12-01), Skalski et al.
patent: 4514832 (1985-04-01), Vescial
patent: 4582429 (1986-04-01), Callaghan
Macek et al., "The Ring Laser", Sperry Engineering Review, vol. 19, 1966, p. 10. FIG. 2.
Forshaw, "An Experimental Ring Laser Rotation Sensor", Proc. of Joint Conf. on Infrared Techniques, Reading Berko England, 621-623, Sep. 1971, pp. 389-396.
Kramsky Elliott N.
Litef GmbH
McGraw Vincent P.
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