Apparatus as tuning filter
AssigneeIndustrial Technology Research Institute
InventorsJen-Chuen Liao, Hong-Xi Cao, Cheng-Fa Chen, Ricky Hsu
Life of this patent
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Abstract
An apparatus as a tuning filter is provided for tuning the wavelength of a laser or a filter between extensive bandwidths, including a reflecting element, an optical system and a movable mount set up in the same optical path in order. The optical system focuses light on the reflecting element that induces dispersion effect. The reflecting element moves along an optical path as a spatial filter. The reflecting element is set up on the movable mount that moves along the optical path to push/pull the reflecting element and then to adjust the moving range of the reflecting element.
Claims13
An apparatus as tuning filter, comprising:
- a reflecting element, linearly movable along an optical path;
- an optical system, for focusing a light into a plurality of focal points substantially falling within a moving range of the reflecting element on the optical path based on a plurality of wavelengths of the light;
- and
- a movable mount, connected with the reflecting element, for moving the reflecting element along the optical path;
- wherein the movable mount, the reflecting element and the optical system are set up in order in the optical path and when one of the focal points falls in the reflecting element, the reflecting element reflects the light with the wavelength corresponding to the focal point falling in the reflecting element,
- wherein the reflecting element includes:
- a pinhole as small as needed for enhancing a mode selection;
- and
- a spherical concave mirror having a spherical center superposed on the pinhole for reflecting the light with the wavelength corresponding to the focal point falling in the pinhole.
Dependencies are inferred from the claim text.