Lens arrays for passive infrared (PIR) applications have achieved broad applicability in devices such as automatic lighting switches and sensors for burglar alarms. They are used to produce a broad, tailored field of view through the accumulation of many repeated narrow fields of view. The infrared energy emitted by a person moving within a room, for instance, is repeatedly imaged onto a thermal detector (usually a pyroelectric detector). The electrical signals thus produced can be used to detect and verify the presence of a person. Devices of this type are generally referred to as “motion sensors,” because the pyroelectric detector usually used has no dc response and therefore does not produce an electrical signal from a stationary warm body.
We presently offer four lines of PIR lens arrays, plus a few assorted types. The four lines are our XX 1.2 GI 12 VX (504K PDF) series, with a focal length of 1.2 inches (30.5 mm) and a downward tilt of 12°; our XX 0.9 GO VX (76K PDF) series, with a focal length of 0.9 inches (23 mm), intended to be used with the grooved side of the lens array facing outward; our XX 0.9 GI 6 TX (56K PDF) series, with a focal length of 0.9 inches (23 mm) and a downward tilt of 6°; and our ceiling-mount line, CM 0.77 GI VX, (204K PDF) with a 0.77 inch (19.6 mm) focal length.
The assorted types include (among others) our popular WA 0.9 GI 6 V2, with a focal length of 0.9 inches (23 mm) and a 6° downward tilt; WA 0.9 GI T1, also with a focal length of 0.9 inches; AA 0.53 GI V1, with a focal length of 0.53 inches (13.5 mm); and EWA 0.3 GI V1, which has a focal length of 0.3 inches (7.6 mm), and is suitable for use in some wall switch-type applications.
Even though we offer a large number of standard lenses and lens arrays for passive infrared applications, we recognize that you may need a type which does not exist. We are pleased to help in this situation, and we will gladly call on our 23 years of PIR lens array design experience in helping you achieve a satisfactory design. If you purchase tooling and the resulting lens array from us, there is no charge for the design.
Our product literature is available here as Adobe Acrobat® PDF files, which we believe give you the highest quality viewing experience. You will need the Adobe Acrobat® Reader, available free for all major platforms, to view these files. The PDF files can also be printed; be sure that "Shrink to Fit" is selected in the print dialog box, in order to be sure that no information is lost near the edge of the page.
If you are having trouble with downloading or printing the PDF files via your own computer system, you will find that many public libraries (at least in the United States) and many office support companies (such as Kinko's) have Web access and can download and print the files for a nominal cost.
