Reflector structure

• US 4,208,090 A
• Filed: 12/22/1976
• Issued: 06/17/1980
• Est. Priority Date: 03/24/1967
• Status: Expired due to Term

• Current Assignee: Stimsonite Corp. (Avery Dennison Corporation)
• Original Assignee: Amerace Corporation (ABB Limited)
• Inventors: Heenan, Sidney A.
• Primary Examiner(s): Corbin, John K.
• Assistant Examiner(s): de los Reyes, B. W.
• Application Number:
  US05/753,132
• Time in Patent Office: 1,273 Days
• Field of Search: 350/96-109, 350/61, 404/12, 404/13, 404/14, 404/9, 404/10, 404/11, 404/15, 404/16
• US Class Current: 359/514
• CPC Class Codes: E01F 9/553 Low discrete bodies, e.g. marking blocks, studs or flexible vehicle-striking members
• CPC Class Codes: G02B 5/124 plural reflecting elements forming part of a unitary plate or sheet

Abstract

There is disclosed a reflector structure that is highly visible both in daylight and at night, the structure including a body of transparent material having a front face and a rear face, the rear face including a continuous support surface having therein a plurality of recesses each defining a cell surrounded by a support wall, a plurality of retrodirective reflector elements disposed in the recesses for reflecting light falling upon the front face back toward the source thereof to render the reflector structure highly visible at night, and a backing member covering the rear face and hermetically sealed to the support surface thus hermetically to seal each of the cells to prevent entry of water, dirt and the like thereinto so as to preserve the reflecting properties of the reflector elements.

Claims

1. A reflector structure for reflecting daylight falling thereon and for reflecting light back toward the source thereof, said reflector structure comprising a one-piece body of transparent material having a substantially smooth light receiving front face, said body having therein a plurality of recesses extending from the rear thereof toward said front face and each defining a cell surrounded by a support wall, the rear faces of said support walls defining a continuous support surface extending substantially throughout the rear of said body, a backing member covering substantially all of the rear of said body and hermetically sealed to said support surface along all portions thereof thus hermetically to seal each of said cells, said backing member having associated therewith means defining a light-diffusing, opaque surface in the area corresponding to said support surface, said light-diffusing surface diffusively reflecting from said reflector structure daylight falling upon said front face in the area thereof corresponding to said support surface for reflecting the daylight therefrom to render said reflector structure highly visible in daylight, a plurality of retrodirective reflector elements on said body in said recesses, and oriented therein to reflect light falling upon said front face, said reflector elements reflecting from said reflector structure light falling upon said front face in the area thereof corresponding to said cells for reflecting the light back toward the source thereof to render said reflector structure highly visible at night.

2. The reflector structure set forth in claim 1, wherein said backing member is a sheet of synthetic organic plastic resin welded to said support surface.

3. The reflector structure set forth in claim 1, wherein an adhesive layer is provided to secure said backing member to said support surface, said adhesive layer also providing said reflector surface.

4. The reflector structure set forth in claim 1, wherein the area of said support surface comprises at least about 50% of the total area of said rear face.

5. The reflector structure set forth in claim 1, wherein the major dimension of each of said cells as viewed in said front face is no greater than about 0.35 inch and said support surface comprises at least about 50% of the total area of said rear face, whereby when said reflector structure is viewed in said front face at a distance of about 100 feet it appears to be of the same shape either when reflecting daylight from the area corresponding to said support surface or when illuminated by a source of light reflected from said retrodirective reflector elements in said cells.

6. A reflector structure for reflecting light back toward the source thereof, said reflector structure comprising a one-piece body of transparent material having a substantially smooth light receiving front face, said body having therein a plurality of rectangular recesses extending from the rear thereof toward said front face and each defining a rectangular cell surrounded by a support wall, the rear faces of said support walls defining a substantially continuous support surface extending substantially through-out the rear of said body, and a plurality of rectangular retrodirective cube corner reflector elements on said body in said recesses and oriented therein to reflect light falling upon said front face, said reflector elements reflecting from said reflector structure light falling upon said front face in the area thereof corresponding to said cells and reflecting the light back toward the source thereof to render said reflector structure highly visible at night.

7. The reflector structure set forth in 6, wherein each of said reflector elements has a square outline.

8. A reflector structure for reflecting light back toward the source thereof, said reflector structure comprising a one-piece body of transparent material having a substantially smooth light receiving front face, said body having therein a plurality of rectangular recesses extending from the rear thereof toward said front face and each defining a cell surrounded by a support wall, the rear faces of said support walls defining a substantially continuous support surface extending substantially throughout the rear of said body, a plurality of rectangular retrodirective cube corner reflector elements on said body in said recesses and oriented therein to reflect light falling upon said front face, said reflector elements reflecting from said reflector structure light falling upon said front face in the area thereof corresponding to said cells and reflecting the light back toward the source thereof to render said reflector structure highly visible at night, and a backing member covering substantially all of the rear of said body and hermetically sealed to said support surface along all portions thereof thus hermetically to seal each of said cells.