Edit In answer to the comment, you should be aware that no matter how transparent is the material in infrared, by absorbing the visible part of the radiation produced by the lamp it will still get hot. So your condition, transparent in IR, absorbant in visible, is not sufficient for your application if you want to avoid the shade getting hot Strong, durable and highly versatile, acrylic sheets are now the preferred material in a huge range of applications. One of the huge advantages of clear acrylic is the fantastic levels of optical clarity. Compared to glass, which delivers below 90%, acrylic allows up to 92% of visible light that it comes in contact with to pass through. Materials that cannot pass infrared light include water, glass, and non-metallic solids, such as plastic, rubber, and stone. Infrared light has a wavelength that is larger than the particles in these materials, so it cannot pass through them. In addition, infrared light cannot pass through a vacuum, as there is nothing for it to interact with For instance, when light passes through a 1/4” thick sheet it will pass through twice as much pigment as when it passes through an 1/8” thick sheet. Therefore, the 1/4” thick sheet transmits less light than the 1/8” inch thick sheet. Graph 4: Light Transmission-White Translucent extruded ACRYLITE® sheet The authors thus recommend UV protection when driving with the windows open. In 2006, Tuchinda et al. [9] reviewed the factors affecting glass UV protective properties, such as glass type, colour, interleaves and coating. They found that clear glass allows up to 90% of VIS light and up to 72% of UV to pass through, depending on its thickness. Gerchman et al. investigated the effect of four UV light emission spectra on HCoV-OC43. In detail, they exposed the viral samples to four different UV wavelengths, each one at a time. The UV sources were two UV LED systems; a circular one, emitting 279-nm or 297-nm UV light, and a custom-made rectangular one, emitting 267-nm or 286-nm UV light. This Stanford University source reveals that short wave UV (UVC) cannot pass through most plastics or ordinary glass. Most acrylic plastics do not allow UV-C wavelengths (100-280 n m ) to penetrate. Modified 8 years, 4 months ago. Viewed 9k times. 2. We are seeking after a motion sensor, probably PIR , that can be covered with regular plastic or ABS ( that means you will have a regular product enclosure where the sensor is inside it ) . I could see that most of them have this white dome covers them , and i wonder if there is an option to JvL7vt.