PIR Lenses2020-01-02T11:48:05+00:00

Infrared Optics

Polymer Optics Ltd is a leading supplier of Passive Infra-Red (PIR) lenses and PIR lens design services to the security and lighting control industries. While our lenses are mostly used for security and lighting applications they have numerous other area sensing applications for products such as fan control, door activation, temperature measurement and general energy measurement. Polymer Optics’ designers have been at the forefront of PIR lens design for over twenty years. Our in-house developed ray-trace software can accurately predict the performance of the PIR lens before committing to tooling. We also develop novel manufacturing methods for precision tooling manufacture and high quality moulded lenses.

Ray Trace Simulation

Raytrace simulation showing PIR detection zones projected on to walls and ceiling. This type of simulation tool helps visualise the performance of the lens and confirms the product design performance.

Walk Test Simulation

Raytrace simulation showing predicted signal response across PIR detection zones. These simulations are used to ensure that an acceptable signal is available from all the Fresnel facets, to guide the product’s electronic design.

Contact Us

Polymer Optics Limited
The Hall, Priory Hill, Rugby Road, Wolston, Coventry CV8 3FZ
+44 (0)2476 937394

Off-the-Shelf Lenses

Off the Shelf Header
Off Shelf Range

Caps Lens 2Caps Lens RoomSmall and compact, these lenses are suitable for numerous security and lighting applications, in the office, or around the home. Lens pushes onto TO5 pyro to ensure correct focal length and orientation. Casing traps lens flange so that lens is held securely.

For further details refer to our PDF datasheet.

Custom Lens

We offer custom lens design services according to your needs. We have designed hundreds of lenses for almost every application. We use Creo CAD software to build 3D lens models. These models are exported to our optical ray-tracing software and optimised for best performance. We also offer tooling and moulding capability.


High Bay Lenses

High Bay Lighting 1

High Bay Lens render with logoZone plot at 12m

The High-Bay lens is designed for indoor passive infra-red (PIR) detection in applications where the detector is mounted relatively high on the ceiling, typically warehouses, workshops, retail and atrium areas.

For further details refer to our PDF datasheet.


Office Lenses

Office Lighting

Office Lens RenderTheoretical zone plot

The Office lens is designed for passive infra-red (PIR) detection in applications where the detector is usually mounted on low ceilings, where minor-motion detection is important: typically offices, washrooms, corridors, cloakrooms and entrance halls.

For further details refer to our PDF datasheet.


FF31 Flat Lenses

Washroom Lighting

FF31 SmallFF31 LargeFF31 Diagram

For applications where aethetic quality is the number one priority we have developed a flat PIR ceiling lens. The lens utilizes POL’s patented freeform Fresnel technology to minimise zone distortion and provide the same detection capability as a domed lens.

For further details refer to our PDF datasheet.


Single Element Lenses


thermo pyro 1Single element Fresnel lens for Thermopile or PIR applications. 15mm focal length. 22mm diameter (including flange).

For further details refer to our PDF datasheet.


We are proud to work with