Method of constructing a segmented mirror

• US 4,678,280 A
• Filed: 03/04/1985
• Issued: 07/07/1987
• Est. Priority Date: 01/07/1980
• Status: Expired due to Fees

• Current Assignee: Roxor Corporation
• Original Assignee: Roxor Corporation
• Inventors: Blom, C. James
• Primary Examiner(s): Henry, Jon W.
• Application Number:
  US06/708,527
• Time in Patent Office: 855 Days
• Field of Search: 350/320, 350/612, 350/613, 350/452, 350/417, 29/416, 29/527.2, 29/527.4, 264/2.5, 264/1.4, 76/107 R, 204/281
• US Class Current: 264/1.37
• CPC Class Codes: B29D 11/00596 Mirrors
• CPC Class Codes: B60R 1/082 using a single wide field mirror or an association of rigidly connected mirrors
• CPC Class Codes: G02B 27/0018 with means for preventing ghost images anti-reflection coatings G02B1/11
• CPC Class Codes: Y10S 359/90 Methods
• CPC Class Codes: Y10T 29/49796 Coacting pieces

Abstract

The invention concerns a method of making a segmented mirror, the mirror comprising, in combination

(a) a myriad of surfaces carried by a support, certain of said surfaces dimensionally offset from one another in a common direction generally parallel to the general direction of incident radiation to reflected, said surfaces being radiation reflecting surfaces each oriented in such a way that as a group they collectively reflect radiation essentially as they were a continuous reflecting surface,

(b) each of said surfaces having a periphery comprising an irregular or repeating series of line segments which are connected, curved or linear, the peripheries of said surfaces, when projected in said common offset direction onto a plane perpendicular thereto, contiguously conforming to one another,

said method including providing a die, used for casting the mirror segmented surface and constructing the die from a casting of a continuous surface of the desired shaped by cutting said casting, or a casting thereof, into small segments, and the segment cross sections being of any outline except circular, in order that the segments may be translated with respect to contiguous segments while maintaining integrity of the composite reflection of all the translated surfaces.

The invention also concerns a mirror having multiple interfitting segments which are wavy edged.

Claims

1. The method of constructing a segmented mirror, the mirror comprising, in combination

(a) a myriad of surfaces carried by the support, certain of said surfaces dimensionally offset from one another in a common direction generally parallel to the general direction of incident radiation to be reflected, said surfaces being radiation reflecting surfaces each oriented in such a way that as a group they collectively reflect radiation essentially as if they were a continuous reflecting surface,

(b) each of said surfaces having a periphery comprising a series of line segments which are connected, curved or linear, the peripheries of said surfaces, when projected in said common offset direction onto a plane perpendicular thereto, contiguously conforming to one another,

said method including providing a die, used for casting the mirror segmented surface, and constructing the die from a casting of a continuous surface of the desired shape by cutting in said common direction said casting, or a casting thereof, into small segments, and the segment cross sections being of any outline except circular, in order that the segments may be translated with respect to contiguous segments while maintaining integrity of the composite reflection from all the translated surfaces, and wherein said segment sides define surfaces with irregular outlines which are substantially non-repetitive.

2. The method of claim 1 including providing the segments with cut borders all of which share one common direction generally perpendicular to the general direction of incident radiation to be reflected.

3. A method of constructing a segmented mirror as in claim 1 characterized in that the direction of cutting is radial from a point at a distance from the surfaces.

18. The method of any of claims 1-3, 5, 6, 7-9, 11, 12, 13, and 14-17 in forming a mirror which is then mounted in or on a vehicle to define a rear or side view mirror for the eyes of the driver.

4. In the method of forming a mirror, the mirror comprising

(a) a support,

(b) a myriad of surfaces carried by the support, certain of said surfaces dimensionally offset from one another in a common direction generally parallel to the general direction of incident radiation to be reflected, said surfaces being radiation reflecting surfaces each oriented in such a way that as a group they collectively reflect radiation essentially as if they were a continuous reflecting surface,

(c) each of said surfaces having a periphery comprising a series of line segments which are connected, curved or linear, the peripheries of said surfaces, when projected in said common offset direction onto a plane perpendicular thereto, contiguously conforming to one another, the steps that include

(i) providing a master block or mold,

(ii) employing a laser beam to cut in a common direction surfaces of said master block or mold thereof, such surfaces corresponding to said surfaces as defined in (b) and (c) above, and

(iii) translating said block or mold surfaces in the common direction of cutting, and casting a mirror media against said translating surfaces,

(d) and wherein said segment sides define surfaces with irregular outlines which are substantially non-repetitive.

12. The method of claim 4 wherein said surfaces are defined on segments which are brought into edge-to-edge contact during said translation.

5. In the method of providing a myriad of surfaces carried by a support, certain of said surfaces dimensionally offset from one another in a common longitudinal direction generally parallel to the general direction of incident radiation to be reflected, said surfaces being radiation reflecting surfaces each oriented in such a way that as a group they collectively reflect radiation essentially as if they were a continuous reflecting surface, the steps that include:

(a) cutting segments of a master block or mold, the segments having surfaces corresponding to said surface,

(b) and longitudinally translating and guiding said segments in said common longitudinal direction and to a predetermined location while blocking lateral displacement of said segments,

(c) and wherein said step of blocking lateral displacement of the segments includes forming longitudinal guide openings in said block or mold, prior to said cutting step, to intersect the intended cut surfaces of the segments.

6. The method of claim 5 including casting a mirror media against said translated surfaces.

7. The method of claim 5 wherein said blocking step also includes longitudinally extending guides into said guide openings after said cutting step, to guide said longitudinally translation of the segments.

8. The method of claim 7 including locating guides in said guide openings to hold the segments in their original lateral juxtapositions after translation.

9. The method of claim 8 wherein said locating of the guides includes providing a second block having openings therein to receive extensions of the guides, and locating the extensions of the guides between block segments in said openings in the second block.

10. The method of any of claims 5, 6, 8, and 9 including peripherally constricting the translated segments of a block or mold, and including fixing the translated segments so they become immobile with respect to one another.

11. The method of claim 5 wherein the segments are translated as in (b) so that sides of adjacent segments are brought into side-by-side relation free of interposed material.

13. The method of claim 5 including forming a die for casting mirror media, against said translated surfaces.

14. The method of constructing a segmented mirror, the mirror comprising, in combination

(a) a myriad of surfaces carried by the support, certain of said surfaces dimensionally offset from one another in a common direction generally parallel to the general direction of incident radiation to be reflected, said surfaces, being radiation reflecting surfaces each oriented in such a way that as a group they collectively reflect radiation essentially as if they were a continuous reflecting surface,

(b) a myriad of surfaces carried by the support, certain of said surfaces dimensionally offset from one another in a common direction generally parallel to the general direction of incident radiation to be reflected, said surfaces being radiation reflecting surfaces each oriented in such a way that as a group they collectively reflect radiation essentially as if they were a continuous reflecting surface,

(c) each of said surfaces having a periphery comprising an irregular or repeating series of line segments which are connected, curved or linear, the peripheries of said surfaces, when projected in said common offset direction onto a plane perpendicular thereto, contiguously conforming to one another, the steps that include

(i) providing a master block or mold,

(ii) employing a laser beam to cut in a common direction surfaces of said master block or mold thereof, such surfaces corresponding to said surfaces as defined in (b) and (c) above, and

(iii) translating said block or mold surfaces in the common direction of cutting, and casting a mirror media against said translating surfaces,

(d) the segments being formed to be substantially identical and triangular, each of the three edges of each segment having approximately the shape of a sinusoidal wave of one or more complete cycles.

15. The method of constructing a segmented mirror, the mirror comprising, in combination

(a) a myriad of surfaces carried by the support, certain of said surfaces dimensionally offset from one another in a common direction generally parallel to the general direction of incident radiation to be reflected, said surfaces being radiation reflecting surfaces each oriented in such a way that as a group they collectively reflect radiation essentially as if they were a continuous reflecting surface,

(c) each of said surfaces having a periphery comprising an irregular or repeating series of line segments which are connected, curved or linear, the peripheries of said surfaces, when projected in said common offset direction onto a plane perpendicular thereto, contiguously conforming to one another, the steps that include

(i) providing a master block or mold,

(ii) employing a laser beam to cut in a common direction surfaces of said master block or mold thereof, such surfaces corresponding to said surfaces as defined in (b) and (c) above and

(iii) translating said block or mold surfaces in the common direction of cutting, and casting a mirror media against said translating surfaces,

(d) the segments being formed to have multiple edges which are wavy.

16. The method of constructing a segmented mirror, the mirror comprising, in combination

(a) a myriad of surfaces carried by the support, certain of said surfaces dimensionally offset from one another in a common direction generally parallel to the general direction of incident radiation to be reflected, said surfaces being radiation reflecting surfaces each oriented in such a way that as a group they collectively reflect radiation essentially as if they were a continuous reflecting surface,

(b) each of said surfaces having a periphery comprising a series of line segments which are connected, curved or linear, the peripheries of said surfaces, when projected in said common offset direction onto a plane perpendicular thereto, contiguously conforming to one another,

said method including providing a die, used for casting the mirror segmented surface, and constructing the die from a casting of a continuous surface of the desired shape by cutting in said common direction said casting, or a casting thereof, into small segments, and the segment cross sections being of any outline except circular, in order that the segments may be translated with respect to contiguous segments while maintaining integrity of the composite reflection from all the translated surfaces, and wherein said segment sides define surfaces with irregular outlines which are substantially non-repetitive and wherein the segments are formed to have the configuration of a continuous wave.

17. The method of claim 16 wherein said wavy edges are formed to have the configuration of a continuous wave.