US4663514A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Elimination of internal reflections and diffractions from junctures in, and at the periphery of, a segmented mirror
Assignee: Roxor Corp
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Filing: 1985-11-18
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Granted: 1987-05-05
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Expires: 2005-11-18
Abstract
Abstract In a transparent molded segmented mirror having individual sectors on a transparent molding and comprising a myriad of reflecting surfaces at the rear side of the mirror away from the viewer, said surfaces located to produce, in the eyes of the viewer, a virtual image, or separate virtual images from separate portions of such molded mirror, there being zones separating the reflecting surfaces, the improvement comprising: (a) a material coating said zones and which includes a light absorber, (b) such material having approximately, the same index of refraction as the transparent molding, (c) whereby undesirable reflections from said zone are substantially reduced, because light impinging thereon cannot be reflected, but is only absorbed. Also, the thickness of light reflecting metallizing material defining the reflective surfaces may be thinned adjacent said zones, and the light absorptive coating may be applied over the thinned metallizing material; and the edges of the molding and of a glass backer may be coated with light absorptives material.
Inventors
- 👤 C. James Blom
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 09:34
CPC Classifications
B; B29; B29D; B29D11/00; B29D11/00596
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
143 words
The method of maximizing the useful reflective area on the operative surface of a molded segmented mirror by employing the following steps in forming segments of a master block to be independently translated along parallel cylindrical guides and into conformance with a datum surface, during the making of a die used in forming the molded segmented mirror: (a) drilling parallel cylindrical guide holes into the block from the rear, inoperative side of the master block, and terminating said drilling before penetrating the operative side of the block, and (b) employing a laser cutter to form cuts through the block and to cut out said segments from the block, and focusing the laser cutter so that the thinnest diameter of the laser beam is coincident with the operative surface of the master block, (c) certain of said cuts formed to intersect said guide holes.
Claim 2
Independent Claim
143 words
The method of maximizing the useful reflective area on the operative surface of a molded segmented mirror by employing the following steps in forming segments of a master block to be independently translated along parallel cylindrical guides and into conformance with a datum surface, during the making of a die used in forming the molded segmented mirror: (a) drilling parallel cylindrical guide holes into the block from the rear, inoperative side of the master block, and terminating said drilling before penetrating the operative side of the block, and (b) employing a laser cutter to form cuts through the block and to cut out said segments from the block, and focusing the laser cutter so that the thinnest diameter of the laser beam is coincident with the operative surface of the master block, (c) certain of said cuts formed to intersect said guide holes.
Claim 3
Independent Claim
203 words
The method of maximizing the useful reflective area of each reflecting surface of a molded segmented mirror by employing the following steps, during the fabrication of a master mold, by cutting into block-segments a master block on which prior to said cutting one surface comprises the operative surface for reflecting light, which cutting is generally perpendicular to said operative surface, the block also having an inoperative side, and which cutting has constant direction, and which block-segments are to be translated along parallel cylindrical guides fitting in previously drilled guide holes which were split lengthwise by said cutting, and which translation is that amount of movement of each block-segment which is necessary to bring the operative surface on that block-segment into contact with a datum surface, said method including: (a) drilling parallel cylindrical guide holes into the block from the rear, inoperative side of the master block, and terminating said drilling before penetrating the operative side of the block, and (b) employing a laser cutter to cut through the block and to cut apart said block-segments from the master block, and focusing the laser cutter so that the thinnest diameter of the laser beam is coincident with the operative surface of the master block.
Claim 4
Independent Claim
203 words
The method of maximizing the useful reflective area of each reflecting surface of a molded segmented mirror by employing the following steps, during the fabrication of a master mold, by cutting into block-segments a master block on which prior to said cutting one surface comprises the operative surface for reflecting light, which cutting is generally perpendicular to said operative surface, the block also having an inoperative side, and which cutting has constant direction, and which block-segments are to be translated along parallel cylindrical guides fitting in previously drilled guide holes which were split lengthwise by said cutting, and which translation is that amount of movement of each block-segment which is necessary to bring the operative surface on that block-segment into contact with a datum surface, said method including: (a) drilling parallel cylindrical guide holes into the block from the rear, inoperative side of the master block, and terminating said drilling before penetrating the operative side of the block, and (b) employing a laser cutter to cut through the block and to cut apart said block-segments from the master block, and focusing the laser cutter so that the thinnest diameter of the laser beam is coincident with the operative surface of the master block.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1990-05-04 | 1990-11-03 | 1991-05-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-05-04 | 1994-11-03 | 1995-05-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-05-04 | 1998-11-03 | 1999-05-05 | $7700.00 | Window Closed / Lapsed |