Tham khảo tài liệu 'crc press mechatronics handbook 2002 by laxxuss episode 2 part 3', kỹ thuật - công nghệ, cơ khí - chế tạo máy phục vụ nhu cầu học tập, nghiên cứu và làm việc hiệu quả | FIGURE The Fairchild semiconductor QVA11234 photointerrupter. FIGURE The Fairchild semiconductor QRB1114 photoreflective sensor. FIGURE A position sensitive detector PSD UDT Sensors Inc. Photointerrupters and photoreflectors can be bought prepackaged or constructed separately from an infrared LED and a photodiode or phototransistor after making certain the detector is sensitive to the wavelength produced by the LED. Photoreflector units are also available with more advanced position sensitive detectors PSDs which report the location of infrared light incident on the sensing surface Fig. . The fixed location of the LED relative to the PSD as well as the location of the image of the infrared light on the PSD allows the 2002 CRC Press LLC FIGURE The Fairchild semiconductor QVA11234 photointerrupter. FIGURE The Fairchild semiconductor QRB1114 photoreflective sensor. FIGURE A position sensitive detector PSD UDT Sensors Inc. Photointerrupters and photoreflectors can be bought prepackaged or constructed separately from an infrared LED and a photodiode or phototransistor after making certain the detector is sensitive to the wavelength produced by the LED. Photoreflector units are also available with more advanced position sensitive detectors PSDs which report the location of infrared light incident on the sensing surface Fig. . The fixed location of the LED relative to the PSD as well as the location of the image of the infrared light on the PSD allows the 2002 CRC Press .
