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.


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Description Price 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 Width
RS Stock No. 919-1001
Mfr. Part No.VCNL4010-GS08
BrandVishay
HK$13.225
Each (On a Reel of 1800)
units
200mm Microcontroller - - 1 13 Surface Mount - 3.95 x 3.95 x 0.75mm - - +85°C -25°C -
RS Stock No. 915-4917
Mfr. Part No.SFH 9206-5/6
HK$8.29
Each (In a Pack of 10)
units
1 → 5mm Phototransistor 30µs 40µs - 6 Surface Mount - 4.2 x 3.4 x 2.1mm 2.1mm 4.2mm +100°C -40°C 3.4mm
RS Stock No. 740-5058
Mfr. Part No.NJL5901AR-1-TE1
HK$5.47
Each (In a Pack of 5)
units
- Phototransistor 30µs 30µs 1 4 Surface Mount COBP - 0.6mm 1.6mm +85°C -30°C 1.3mm
RS Stock No. 666-6564
Mfr. Part No.GP2Y0A21YK0F
BrandSharp
HK$100.65
Each
units
800mm - - - - - - - - - - +60°C -10°C -
RS Stock No. 708-5348
Mfr. Part No.CNY70
BrandVishay
HK$11.896
Each (In a Pack of 5)
units
0.5mm Phototransistor - - 1 4 Through Hole - 7 x 7 x 6mm 6mm 7mm +85°C -40°C 7mm
RS Stock No. 919-0082
Mfr. Part No.CNY70
BrandVishay
HK$7.045
Each (In a Tube of 80)
units
0.5mm Phototransistor - - 1 4 Through Hole - 7 x 7 x 6mm 6mm 7mm +85°C -40°C 7mm
RS Stock No. 170-2453
Mfr. Part No.GP2S60
BrandSharp
HK$2.472
Each (On a Reel of 2000)
units
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
RS Stock No. 170-9657
Mfr. Part No.SFH 9206-5/6
HK$4.689
Each (On a Reel of 1000)
units
1 → 5mm Phototransistor 30µs 40µs - 6 Surface Mount - 4.2 x 3.4 x 2.1mm 2.1mm 4.2mm +100°C -40°C 3.4mm
RS Stock No. 773-0420
Mfr. Part No.VCNL4010-GS08
BrandVishay
HK$30.205
Each (In a Bag of 2)
units
200mm Microcontroller - - 1 13 Surface Mount - 3.95 x 3.95 x 0.75mm - - +85°C -25°C -
RS Stock No. 168-5476
Mfr. Part No.SFH 9206
HK$4.058
Each (On a Reel of 1000)
units
5mm Phototransistor 30µs 40µs 1 6 Surface Mount SMD 6.2 x 2.1 x 4.2mm 4.2mm 6.2mm +100°C -40°C 2.1mm
RS Stock No. 170-0778
Mfr. Part No.OPB705
BrandOptek
HK$23.36
Each (In a Bag of 25)
units
3.8mm Phototransistor - - 1 4 - - 17.78 x 5.08 x 22.86mm 22.86mm 17.78mm - - 5.08mm
RS Stock No. 455-0947
Mfr. Part No.OPB705
BrandOptek
HK$23.79
Each
units
3.8mm Phototransistor - - 1 4 - - 17.78 x 5.08 x 22.86mm 22.86mm 17.78mm - - 5.08mm
RS Stock No. 761-3984
Mfr. Part No.QRE1113GR
HK$9.352
Each (In a Pack of 5)
units
- Phototransistor 20µs 20µs 1 4 Surface Mount SMD 3.6 x 2.9 x 1.7mm 1.7mm 3.6mm +85°C -40°C 2.9mm
RS Stock No. 414-175
Mfr. Part No.OPB720A-06Z
BrandOptek
HK$131.33
Each
units
152mm Open Collector - - 1 3 Screw Mount - 17.15 x 8.38 x 27.94mm 27.94mm 17.15mm +50°C 0°C 8.38mm
RS Stock No. 178-7429
Mfr. Part No.GP2Y0A710K0F
BrandSharp
HK$119.604
Each (In a Box of 500)
units
5500mm - - - - - - - - - - +60°C -10°C -
RS Stock No. 455-0975
Mfr. Part No.SG2BC, BCD
BrandKodenshi
HK$13.06
Each (In a Pack of 5)
units
- Phototransistor 30µs 30µs - 4 - - - - - +90°C -20°C -
RS Stock No. 666-6577
Mfr. Part No.GP2Y0A710K0F
BrandSharp
HK$181.14
Each
units
5500mm - - - - - - - - - - +60°C -10°C -
RS Stock No. 124-1360
Mfr. Part No.QRE1113GR
HK$3.039
Each (On a Reel of 1000)
units
- Phototransistor 20 μ 20µs 1 4 Surface Mount SMD 3.6 x 2.9 x 1.7mm 1.7mm 3.6mm 85°C -40°C 2.9mm
RS Stock No. 778-1396
Mfr. Part No.SFH 9206
HK$11.64
Each (In a Pack of 5)
units
5mm Phototransistor 30µs 40µs 1 6 Surface Mount SMD 6.2 x 2.1 x 4.2mm 4.2mm 6.2mm +100°C -40°C 2.1mm
RS Stock No. 170-0730
Mfr. Part No.OPB720A-06Z
BrandOptek
HK$128.678
Each (In a Bag of 25)
units
152mm Open Collector - - 1 3 Screw Mount - 17.15 x 8.38 x 27.94mm 27.94mm 17.15mm +50°C 0°C 8.38mm
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