Single element optics for passive facet tracking

Details Single element optics for passive facet tracking Single element optics for passive facet tracking

1996-05-01

1997-07-22

Phan, James

Optical: systems and elements

Deflection using a moving element

Using a periodically moving element

359203, 359208, 359217, 347259, 347261, G02B 2608

Patent

active

056508719

ABSTRACT:
A double bounce passive facet tracking system uses a single passive optical component of a toroidal mirror to induce a beam of light to track a facet of a dual mirror rotating polygon. A beam focused in both the tangential and sagittal planes is reflected from a convex facet of the polygon mirror to the toroidal mirror. The toroidal mirror collimates the light beam in a tangential plane and focuses the beam in the sagittal plane so that the beam is collimated in the tangential plane and focussed in the sagittal plane when it reaches the flat facet of the polygon mirror.

REFERENCES:
patent: 3973826 (1976-08-01), Lobb
patent: 4846552 (1989-07-01), Veldkamp et al.
patent: 5475524 (1995-12-01), Harris

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