Reflective Optical Sensors
Image sensors are devices that convert light waves or electromagnetic radiation that pass through or reflect off the object into a piece of information that constitutes an image. Image sensors are commonly used in photography and videography industries, for producing digital cameras, medical imaging equipment, night vision cameras, thermal imaging devices, radars, sonars etc. Image sensors are built from thousands of small light-sensitive cells that capture the light, recognise the colour and convert it into a digital signal. There are two main types of sensors on the market and they are CCD sensors and CMOS sensors.
CCD
In this sensor every light-sensitive cell is an analogue device. When light strikes the chip it is held as a small electrical charge in each photo cell. The charges in the line of pixels nearest to the (one or more) output amplifiers are amplified and output, then each line of pixels shifts its charges one line closer to the amplifier, filling the empty line closest to the amplifiers. This process is then repeated until all the lines of pixels have had their charge amplified and output.
CMOS
CMOS sensors are different in build from CCD sensors. CMOS image sensor has an amplifier for each pixel compared to the few amplifiers of a CCD. This results in less area for the capture of photons than a CCD, but this problem has been overcome by using micro lenses in front of each photodiode, which focus light into the photodiode that would have otherwise hit the amplifier and not be detected. CMOS sensors can potentially be implemented with fewer components, use less power, and/or provide faster readout than CCD sensors. They are also less vulnerable to static electricity discharges.
Jämföra Produktdetaljer Pris (ex. moms) | Varumärke | Peak Sensor Distance | Output Device | Typical Rise Time | Typical Fall Time | Number of Channels | Number of Pins | Mounting Type | Package Type | Dimensions | Height | Length | Maximum Operating Temperature | Minimum Operating Temperature | Output Signal Type | Width |
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Var (i en påse med 100) 21,502 kr | Sharp | - | Transistor | 0.5µs | 0.5µs | 1 | 5 | Through Hole | OPIC | 18.6 x 15.2 x 5mm | 5mm | 18.6mm | +85°C | -25°C | - | 15.2mm | |||
Var (i ett paket med 5) 40,656 kr | Sharp | - | Transistor | 0.5µs | 0.5µs | 1 | 5 | Through Hole | OPIC | 18.6 x 15.2 x 5mm | 5mm | 18.6mm | +85°C | -25°C | - | 15.2mm | |||
Var (i en bricka med 50) 69,033 kr | Sharp | 1500mm | - | - | - | - | 3 | Screw Mount | - | 44.5 x 18.9 x 21.6mm | 21.6mm | 44.5mm | +60°C | -10°C | - | 18.9mm | |||
Varje 164,80 kr | Sharp | 1500mm | - | - | - | - | 3 | Screw Mount | - | 44.5 x 18.9 x 21.6mm | 21.6mm | 44.5mm | +60°C | -10°C | - | 18.9mm | |||
Var (i en rulle med 2000) 3,239 kr | Sharp | 0.7mm | Phototransistor | 20µs | 20µs | 1 | 4 | Surface Mount | SMD | 3.2 x 1.7 x 1.1mm | 1.1mm | 3.2mm | +85°C | -25°C | - | 1.7mm | |||
Var (i ett paket med 5) 5,42 kr | Sharp | 0.7mm | Phototransistor | 20µs | 20µs | 1 | 4 | Surface Mount | SMD | 3.2 x 1.7 x 1.1mm | 1.1mm | 3.2mm | +85°C | -25°C | - | 1.7mm | |||
Varje 121,88 kr | Sharp | 800mm | - | - | - | - | - | - | - | - | - | - | +60°C | -10°C | - | - | |||
Var (i en låda med 1000) 55,128 kr | Sharp | 800mm | - | - | - | - | - | - | - | - | - | - | +60°C | -10°C | - | - | |||
Varje 103,91 kr | Sharp | 300mm | - | - | - | - | - | - | - | - | - | - | +60°C | -10°C | - | - | |||
Var (i en bricka med 1000) 63,211 kr | Sharp | 300mm | - | - | - | - | - | - | - | - | - | - | +60°C | -10°C | - | - | |||
Varje 165,02 kr | Sharp | 5500mm | - | - | - | - | - | - | - | - | - | - | +60°C | -10°C | - | - | |||
Var (i en påse med 100) 36,536 kr | Sharp | 27 (Non-Detection) mm, 9 (Detection) mm | Photointerrupter | - | - | - | - | Surface Mount | - | 39.8 x 9 x 8.65mm | 8.65mm | 39.8mm | +60°C | -10°C | Analogue | 9mm | |||
Var (i en påse med 100) 34,436 kr | Sharp | 22 (Detection) mm, 90 (Non-Detection) mm | Photointerrupter | - | - | - | - | Surface Mount | - | 39.8 x 9 x 8.65mm | 8.65mm | 39.8mm | +70°C | -10°C | Analogue | 9mm | |||
Varje 40,48 kr | Sharp | 27 (Non-Detection) mm, 9 (Detection) mm | Photointerrupter | - | - | - | - | Surface Mount | - | 26.8 x 9 x 8mm | 8mm | 26.8mm | +60°C | -10°C | Analogue | 9mm | |||
Var (i ett paket med 20) 5,684 kr | Sharp | 0.5mm | Phototransistor | 20µs | 20µs | - | - | Surface Mount | SMD | 3.2 x 1.7 x 1.1mm | 1.1mm | 3.2mm | +85°C | -25°C | - | 1.7mm | |||
Varje 69,33 kr | Sharp | - | - | - | - | - | - | - | - | - | - | - | +60°C | -10°C | - | - | |||
Var (i en påse med 100) 37,774 kr | Sharp | 27 (Non-Detection) mm, 9 (Detection) mm | Photointerrupter | - | - | - | - | Surface Mount | - | 26.8 x 9 x 8mm | 8mm | 26.8mm | +60°C | -10°C | Analogue | 9mm | |||
Var (i en bricka med 50) 68,707 kr | Sharp | 80cm | - | - | - | - | - | Surface Mount | - | 37 x 13 x 21.6mm | 21.6mm | 37mm | +60°C | -10°C | Digital | 13mm | |||
Var (i en påse med 100) 35,243 kr | Sharp | 27 (Non-Detection) mm, 9 (Detection) mm | Photointerrupter | - | - | - | - | Surface Mount | - | 39.8 x 9 x 8.65mm | 8.65mm | 39.8mm | +60°C | -10°C | Analogue | 9mm | |||
Var (i ett paket med 2) 69,315 kr | Sharp | 22 (Detection) mm, 90 (Non-Detection) mm | Photointerrupter | - | - | - | - | Surface Mount | - | 39.8 x 9 x 8.65mm | 8.65mm | 39.8mm | +70°C | -10°C | Analogue | 9mm | |||