Sealed reflector apparatus

Details Sealed reflector apparatus Sealed reflector apparatus

1998-07-13

1999-12-07

Spyrou, Cassandra

Optical: systems and elements

Protection from moisture or foreign particle

Sealing

359838, 359883, G02B 1104, G02B 522

Patent

active

059971444

DESCRIPTION:

BRIEF SUMMARY
FIELD OF THE INVENTION

The present invention relates to a reflector apparatus.


SUMMARY OF THE INVENTION

In accordance with one aspect of the present invention there is provided a reflector apparatus comprising a reflective layer enclosed within a sealed envelope.


BRIEF DESCRIPTION OF THE DRAWING

The present invention will now be described, by way of example, with reference to the accompanying drawing which is a schematic side elevation of a reflector apparatus in accordance with the present invention.


DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT

In the drawing, there is shown a reflector apparatus 10 comprising a base 12, a wall 14 extending around the base 12, a sealed envelope 16 mounted on, to or above the base 12 and a transparent or translucent, light transmitting cover sheet 18 mounted within the wall 14 on, to or above the envelope 16.
The base 12 may be formed from a non thermally conductive material such as a rigid foam material and may be molded to any shape. The base 12 is preferably substantially impervious to liquids and gases.
The wall 14 extends around the base 12 and is upstanding relative thereto. Further, the wall 14 is sealingly connected to the base 12 by any convenient means.
The cover sheet 18 is formed of a transparent or translucent, light transmitting material such as glass, low ion glass or plastics material such as acrylic material. The cover sheet 18 is sealingly connected to the wall 14 by any convenient means.
The envelope 16 contains a lower sheet 20 and an upper sheet 22. The lower sheet 20 may be formed of plastics material such as acrylic material or any similar material. Further, the lower sheet 20 is preferably light absorptive and in this connection may be formed of a black material or have a black layer applied thereto.
The upper sheet 22 is formed of transparent or translucent light transmitting material and may be formed of a plastics material such as acrylic material or any similar material. Disposed between the lower sheet 20 and the upper sheet 22 is a reflective layer 24 which is typically formed of metal. The layer 24 may be applied to a lower face of the upper sheet 22 or to an upper face of the lower sheet 20 or to both of the aforementioned upper and lower faces. The layer 24 may be applied by a convenient means such as by spraying, sputtering or evaporation.
The metallic reflective layer 24 may be formed of silver which is a highly reflective material. Alternatively, the metallic reflective layer 24 may be formed of other metals such as aluminium.
The envelope 16 is completed by a lateral seal 26 which is affixed to edges of the sheets 20 and 22 by any convenient means such as by heat fusion or adhesive. The seal 26 prevents ingress of gases or moisture into the region between the sheets 20 and 22 and thereby preventing corrosion of the reflective layer 24.
Further each of the sheets 20 and 22 is preferably provided with an antipermeation layer in intimate contact with external faces thereof. The antipermeation layer for the lower sheet 20 may be black plastics material or aluminium foil. The antipermeation layer of the upper sheet 22 may be light transmitting and resistant to corrosion, UV radiation, bird attack and impacts. The antipermeation layer for the upper sheet 22 may be formed of a thin, flexible glass sheet, acrylic film or the like, which permits shaping of the apparatus 10. In the embodiment illustrated, the cover sheet 18 acts as an antipermeation layer.
The reflector apparatus 10 can be formed in a flat shape as shown or it can be formed into other desired shapes such as a parabolic shape.
Further, several reflector apparatuses 10 can be joined together side by side to form an overall larger reflective area.
Modifications and variations such as would be apparent to a skilled addressee are deemed within the scope of the present invention. For example, the sheets 20 and 22 could be clamped together to form the sealed envelope 16.
1. A reflector apparatus characterised by including a housing having a base, a wall extending around th

REFERENCES:
patent: 1930244 (1933-10-01), Lewinsohn et al.
patent: 3160736 (1964-12-01), Catterson
patent: 3473867 (1969-10-01), Byrnes
patent: 3507563 (1970-04-01), Berman et al.
patent: 3542455 (1970-11-01), Jensen
patent: 3709765 (1973-01-01), Miles
patent: 4547432 (1985-10-01), Pitts et al.
patent: 5790298 (1998-08-01), Tonar

Affiliated with

Also associated with

Rating

Sealed reflector apparatus does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Sealed reflector apparatus, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Sealed reflector apparatus will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-816447