To test whether a lamp emits near-infrared light, you can try the following methods:
Visual Inspection: Near-infrared light is not visible to the human eye, but it may emit a faint red glow. Turn on the lamp in a dark room and check if you observe any dim red light. Keep in mind that this method is not definitive proof of near-infrared emission.
Remote Control Test: Near-infrared light is often used in remote controls. If you have a digital camera or a smartphone with a camera, you can use it to test the lamp. Turn on the camera and point the lamp towards the camera lens while pressing any button on a remote control. If you see a faint purple glow on the camera screen, it indicates near-infrared emission.
Heat Sensing Camera: Near-infrared light produces heat. If you have access to a heat-sensing camera, such as a thermal imaging camera, you can use it to determine whether the lamp emits near-infrared light. When the lamp is turned on, check if the camera detects a heat signature.
Near-Infrared Filter: You can purchase a near-infrared filter specifically designed to block visible light while allowing near-infrared light to pass through. Attach the filter to the lamp and observe if it filters out the visible light, leaving only near-infrared light to pass through.
If you want a more accurate assessment of the near-infrared emission, you might consider using a spectrometer, which is a device used to measure the wavelengths of light. This would provide a precise measurement of the emitted light spectrum.
Remember to follow safety precautions and manufacturer's instructions when performing any tests or experiments with the lamp.