Optical arrangement for performing null testing of aspheric surf

Details Optical arrangement for performing null testing of aspheric surf Optical arrangement for performing null testing of aspheric surf

1993-12-22

1995-04-25

Turner, Samuel A.

Optics: measuring and testing

By dispersed light spectroscopy

Utilizing a spectrometer

356354, G01B 902

Patent

active

054104084

ABSTRACT:
An improved null optical testing arrangement (22) for null testing aspheric surfaces of optics includes a reflective/diffractive null optical component (24). The reflective/diffractive null optical component (24) provides a reflective/diffractive surface (30) that is easily qualified as a null testing optical arrangement. The reflective/diffractive surface (30) of the null optic (24) generates a reference wavefront which can be completely characterized by measuring the diameters of diffractive rings with an interferometer (42).

REFERENCES:
patent: 4115747 (1978-09-01), Sato et al.
patent: 4239392 (1980-12-01), Pohle
patent: 5155553 (1992-10-01), Chen
patent: 5155554 (1992-10-01), Schnable et al.

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