Refractive lens cradle

Details Refractive lens cradle Refractive lens cradle

1995-02-27

1996-09-10

Ben, Loha

Optical: systems and elements

Lens

With support

359820, G02B 702

Patent

active

055551343

ABSTRACT:
A refractive lens element (16) with a very thin edge thickness is mounted to withstand gun shock loads by utilizing a cell cradle (14) that is contoured to conform to the lens element surface profile (24). The lens is employed in a system having a rectangular clear aperture (26) which when projected on the circular lens defines four lens segments (36a-36d) outside of the clear aperture. The cell cradle has an opening (26) conforming to the clear aperture and carries a compliant padding (40) coextensive with the lens segments outside of the clear aperture to support the lens axially. The lens perimetrical edge (20) is bonded to the cell with a compliant bond material (44) to secure the lens in a radially symmetric position.

REFERENCES:
patent: 4725126 (1988-02-01), Siga et al.
patent: 4854671 (1989-08-01), Hanke et al.
patent: 4909599 (1990-03-01), Hanke et al.
patent: 5177641 (1993-01-01), Kobayashi et al.

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