Digital Camera Formats
Area Scan Line Scan
• 4:3 (H:V) Ratio (Typical) • Sensor is Linear
• High Speed Applications Up to a Few Hundred FPS • High Speed Applications- Line rates Up to 100 khz
• Object is Stationary or Slowly Moving • Constructs Image One Line at a Time
• Wider Range of Applications • Object Passes in Motion Under Sensor
• Easier to Set-up • Ideal for Capturing Wide Objects
• Lower Cost than Line Scan • Special Alignment & Timing Required
• Complex Integration / Simple, but Intense, Illumination
Monochrome VS. Color
Monochrome Color (Single Chip) 3 Chip Color Cameras
• Single Sensor Outputs Grayscale Images • Uses RGB Bayer Color Filter (Typical) • Utilizes a Prism to Split White Light into 3 Different Sensors
• 10% Higher Resolution than Comparable Single-Chip Color Cameras • Lower Resolution (More Pixels Required To Recognize Color) • More Costly
• Better Signal-To-Noise Ratio; Greater Contrast • Better Color Resolution
• Increased Low-light Sensitivity • Smaller Selection of Lenses
• Mag Require Specially Designed Lenses
CCD CMOS CCD CMOS
Pixel Signal: Electron Packet Voltage Uniform: High Moderate
Chip Signal: Analog Digital Resolution: Low-High Low-High
Fill Factor: High Moderate Speed: Moderate-High High
Responsivity: Moderate Moderate-High Power Consumption: Moderate-High Low
Noise Level: Low Low to High Complexity: Low Moderate
Dynamic Range: High Moderate to High Cost: Moderate Low
4.8 5.8 6.4 7.2
3.6 6.0 4.3 7.2 4.8 8.0 5.4 9.0
43.3
Shop www.edmundoptics.eu – latest pricing – availability – new products – over 34.000 items 373
EO
cameras
Allied Vision
cameras
FLIR
cameras
Basler
cameras
PixeLINK
cameras
Lucid Vision
cameras
Dalsa
cameras
specialty
cameras
camera
accessories
CCD vs. CMOS Sensors
Sensors CCD (Charge Coupled Device) and CMOS (Complementary Metal
Oxide Semiconductor) are di erent sensor technologies for converting light
into electronic signals. In a CCD, each pixel’s charge is converted to voltage,
bu ered, and transferred through a single node as an analog signal. In a
CMOS sensor, the charge-to-voltage conversion is done at the pixel level.
Historically, this conversion yielded a less uniform output.
New advances in CMOS technology over the
last several years have helped greatly reduce
the non-uniformity in low light environments,
and in many applications high-end CMOS
sensors can outperform the comparable
CCD. Additionally, CMOS has lower power
consumption than CCD, which makes them
useful for any space-constrained application.
Lower-end CMOS sensors with pixels smaller
than approximately 3 microns are still outperformed
by CCD in terms of image quality.
Camera Comparison Units: mm
Sensor Size
Determines System Field Of View (FOV)
Determines Required Primary Magnifi cation (PMAG)
Most Have a 4:3 (H:V) Dimensional Aspect Ratio
½ Inch
8.8
6.6 11.0
12.8
9.6 16
1 Inch
17.3
13 21.6
⁄ Inch
22.4
16.8 27.9
APS-C
29.2
20.2 35.5
APS-H
14.08
10.56 17.6
1.1 Inch
24
36
35mm
Inch ½.5 Inch ⁄.8 Inch Inch
Camera Resolution by Pixel Size
Pixel Size (μm) 9,9 7,4 5,86 5,5 4,54 3,69 3,45 2,2 1,67
Resolution (lp/mm) 50,5 67,6 85,3 90,9 110,1 135,5 144,9 227,3 299,4
Typical ½ " Sensor (MP) 0,31 0,56 0,89 1,02 1,49 2,26 2,58 6,35 11,02
Typical " Sensor (MP) 0,59 1,06 1,69 1,92 2,82 4,27 4,88 12,00 20,83
/www.edmundoptics.eu