Optical system and method

摘要

An optical system in a video probe assembly includes a plurality of lenses configured to refract separate linearly polarized rays under different refractive indexes to form a plurality of different focal lengths. The optical system includes at least one light modulating element that modulates a polarization state of the linearly polarized rays passing through the at least one light modulating element in response to a control signal. The optical system includes a polarizer element that filters out some of the modulated linearly polarized rays passing through the polarizer element. A method of inspecting a target with an optical system of a video probe assembly is also provided.

主权项

1. An optical system in a video probe assembly, the optical system including:
a plurality of lenses, each having at least one curved surface, configured to refract separate decomposed linearly polarized rays under different refractive indexes to form a plurality of different focal lengths; a plurality of light modulating elements each configured to modulate a polarization state of the linearly polarized rays proceeding from at least one of the plurality of lenses and passing through the respective light modulating elements in response to a control signal; and a polarizer element configured to filter out some of the linearly polarized rays proceeding from at least one of the plurality of light modulating elements and passing through the polarizer element; and an imager located adjacent to the polarizer element to receive polarized rays proceeding from the polarizer element.