Reflective Optical Sensors, CCD, CMOS Sensor | RS
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    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.

    109 產品顯示為 Reflective Optical Sensors

    Vishay
    2.5mm
    Phototransistor
    -
    -
    1
    -
    Through Hole
    PCB
    -
    7mm
    10.2mm
    + 85°C
    - 25°C
    -
    -
    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
    Vishay
    3mm
    Phototransistor
    9000ns
    16000ns
    2
    -
    Surface Mount
    SMD
    -
    -
    -
    -
    -
    -
    -
    Vishay
    2.5mm
    -
    -
    -
    -
    -
    -
    -
    -
    -
    -
    -
    -
    -
    -
    Sharp
    1500mm
    -
    -
    -
    -
    3
    Screw Mount
    -
    44.5 x 18.9 x 21.6mm
    21.6mm
    44.5mm
    +60°C
    -10°C
    -
    18.9mm
    Sharp
    300mm
    -
    -
    -
    -
    -
    -
    -
    -
    -
    -
    +60°C
    -10°C
    -
    -
    Sharp
    300mm
    -
    -
    -
    -
    -
    -
    -
    -
    -
    -
    +60°C
    -10°C
    -
    -
    Optek
    6.35mm
    Phototransistor
    -
    -
    1
    4
    Screw Mount
    -
    29.59 x 7.62 x 13.34mm
    13.34mm
    29.59mm
    +85°C
    -40°C
    -
    7.62mm
    Omron
    55mm
    Open Collector
    -
    -
    3
    -
    -
    -
    -
    -
    -
    -
    -
    -
    -
    Vishay
    0.5mm
    Phototransistor
    -
    -
    1
    4
    Through Hole
    -
    7 x 7 x 6mm
    6mm
    7mm
    +85°C
    -40°C
    -
    7mm
    Vishay
    3mm
    Phototransistor
    9000ns
    16000ns
    2
    -
    Surface Mount
    SMD
    -
    -
    -
    -
    -
    -
    -
    Sharp
    800mm
    -
    -
    -
    -
    -
    -
    -
    -
    -
    -
    +60°C
    -10°C
    -
    -
    Optek
    152mm
    Open Collector
    -
    -
    1
    3
    -
    -
    17.15 x 8.38 x 27.94mm
    27.94mm
    17.15mm
    +70°C
    0°C
    -
    8.38mm
    ROHM
    6mm
    Phototransistor
    10µs
    10µs
    1
    4
    Through Hole
    Radial
    6.4 x 4.9 x 6.5mm
    6.5mm
    6.4mm
    +85°C
    -25°C
    -
    4.9mm
    Broadcom
    5mm
    Photodiode
    50ns
    50ns
    -
    4
    Surface Mount
    SMD
    6.9 x 2.78 x 2.7mm
    2.7mm
    6.9mm
    +85°C
    -40°C
    -
    2.75mm
    Vishay
    0.5mm
    Phototransistor
    -
    -
    1
    4
    Through Hole
    -
    7 x 7 x 6mm
    6mm
    7mm
    +85°C
    -40°C
    -
    7mm
    Nisshinbo Micro Devices
    -
    Phototransistor
    30µs
    30µs
    1
    4
    Surface Mount
    COBP
    -
    0.6mm
    1.6mm
    +85°C
    -30°C
    -
    1.3mm
    Optek
    3.81mm
    Phototransistor
    -
    -
    1
    4
    Through Hole
    -
    17.78 x 4.78 x 8.89mm
    8.89mm
    17.78mm
    +85°C
    -40°C
    -
    4.78mm
    Vishay
    0.9mm
    Transistor
    10µs
    15µs
    1
    -
    Surface Mount
    SMD
    -
    -
    -
    -
    -
    -
    -
    Optek
    1in
    Phototransistor
    -
    -
    1
    4
    Through Hole
    -
    12.19 x 5.08 x 12.7mm
    12.7mm
    12.19mm
    +85°C
    -40°C
    -
    5.08mm
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