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Telecentricity

With a normal (entocentric) lens, magnification differs when changing the distance from the lens, like seeing with our eyes. Additionally, features which are located at the edge of an image are viewed at a different angle than objects in the centre of the field of view (FoV). This makes the measurement task very difficult.

Telecentric lenses are used for performing exact measurements of objects because they offer images which represent the exact size of an object regardless of its position within the FoV or its distance from the lens. 

Like all our products, we offer custom made lenses tailored to your specific needs on request.



Entozentrischen Aufnahme

Dummy 360x360

Telezentrische Aufnahme

Picture of same object': left with a entocentric and added the right with a telecentric lens. One sees clearly left the perspective distortions that come about through the divergent (divergent) beam paths of the entocentric (normal) lens.


Bi-telecentric

Bi-telezentrische Objektive

All Opto telecentrics are optimized for C-mount cameras with chip sizes up to 2/3“, and represent the ideal solution for measurements of precision components with the best price/performance ratio.


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Advantages
  • Large Field Depth
  • No perspective error with three dimensional objects
  • Homogeneous image acquisition with high light sensitivity
  • High resolution Object- and image side telecentric imaging
  • Universal C-Mount
Applications & Markets
  • Measurement of profiles
  • Determination of diameters
  • Adjustment of electronic components
  • Measurement of objects with large height
  • C-Mount cameras supported up to 2/3“ (CCD- or CMOS-chip)

Image taken with a standrad objective

Image taken with our bi-telecentric objective

Artikel Nr.
Beschreibung
100-BTC-003
Bi-telecentric objective 0.03x
download
Bi-telecentric (object and image side)
Magnification: 0.03x
Field of view (with 1/2" chip): 218 x 163 mm
Field of view (with 1/1.8" chip): 242 x 180 mm
Field of view (with 2/3" chip): 290 x 218 mm*
* slight vignetting possible
Distortion: <0.05%
Telecentricity: <0.05°
Resolution (MTF@70 LP/mm): 50%
Aperture: F8
Depth of focus: 780 mm
Working distance: 732 mm
Dimensions ŘxL: 306 x 854 mm
Clamp diameter: 220 mm
Clamp length: 136.7 mm
Camera thread: C-Mount
Weight: 15100 g
100-BTC-005
Bi-telecentric objective 0.05x
download
Bi-telecentric (object and image side)
Magnification: 0.05x
Field of view (with 1/2" chip): 125 x 94.1 mm
Field of view (with 1/1.8" chip): 139 x 104 mm
Field of view (with 2/3" chip): 167 x 125 mm*
* slight vignetting possible
Distortion: <0.07%
Telecentricity: < 0.08°
Resolution (MTF@70 LP/mm): 50%
Aperture: F8
Depth of focus: 253 mm
Working distance: 416 mm
Dimensions ŘxL: 205 x 502 mm
Clamp diameter: 110 mm
Clamp length: 120,7 mm
Camera thread: C-Mount
Weight: 5340g
100-BTC-006
Bi-telecentric objective 0.06x
download
Bi-telecentric (object and image side)
Magnification: 0.06x
Field of view (with 1/2" chip): 106.7 x 80 mm
Field of view (with 1/1.8" chip): 118 x 89 mm
Field of view (with 2/3" chip): 142 x 106 mm*
* slight vignetting possible
Distortion: <0.07%
Telecentricity: < 0.08°
Resolution ( MTF@70 LP/mm): 50%
Aperture: F 8
Depth of focus: 186 mm
Working distance: 355 mm
Dimensions ŘxL: 179 x 446 mm
Clamp diameter: 110 mm
Clamp length: 120.8 mm
Camera thread: C-Mount
Weight: 4250g
100-BTC-008
Bi-telecentric objective 0.08x
download
Bi-telecentric (object and image side)
Magnification: 0.08x
Field of view (with 1/2" chip): 79 x 59.2 mm
Field of view (with 1/1.8" chip): 88 x 65 mm
Field of view (with 2/3" chip): 105 x 79 mm*
* slight vignetting possible
Distortion: <0.07%
Telecentricity: < 0.08°
Resolution ( MTF@70 LP/mm): 50%
Aperture: F 8
Depth of focus: 101 mm
Working distance: 256 mm
Dimensions ŘxL: 141 x 346 mm
Clamp diameter: 63 mm
Clamp length: 54.5 mm
Camera thread: C-Mount
Weight: 1960g
100-BTC-010
Bi-telecentric objective 0.1x
download
Bi-telecentric (object and image side)
Magnification: 0.1x
Field of view (with 1/2" chip): 65 x 49 mm
Field of view (with 1/1.8" chip): 72 x 54 mm
Field of view (with 2/3" chip): 86 x 65 mm*
* slightly vignetting possible
Distortion: <0.07%
Telecentricity: < 0.08°
Resolution ( MTF@70 LP/mm): 50%
Aperture: F8
Depth of focus: 68 mm
Working distance: 210 mm
Dimensions ŘxL: 122 x 296 mm
Clamp diameter: 63 mm
Clamp length: 54.5 mm
Camera thread: C-Mount
Weight: 1700g
100-BTC-016
Bi-telecentric objective 0.16x
download
Bi-telecentric (object and image side)
Magnification: 0.16x
Field of view (with 1/2" chip): 40.7 x 30.5 mm
Field of view (with 1/1.8" chip): 45 x 33.8 mm
Field of view (with 2/3" chip): 54 x 40.5 mm*
* slight vignetting possible
Distortion: <0.08%
Telecentricity: < 0.08°
Resolution ( MTF@70 LP/mm): 50%
Aperture: F8
Depth of focus: 27 mm
Working distance: 150 mm
Dimensions ŘxL: 79 x 236 mm
Clamp diameter: 63 mm
Clamp length: 54.5 mm
Camera thread: C-Mount
Weight: 840g
100-BTC-020
Bi-telecentric objective 0.2x
download
Bi-telecentric (object and image side)
Magnification: 0.2x
Field of view (with 1/2" chip): 32 x 24 mm
Field of view (with 1/1.8" chip): 35 x 27 mm
Field of view (with 2/3" chip): 42.5 x 32 mm*
* slightly vignetting possible
Distortion: <0.08%
Telecentricity: < 0.08°
Resolution ( MTF@70 LP/mm): 45%
Aperture: F8
Depth of focus: 17 mm
Working distance: 103 mm
Diameter x length: 68 x 171 mm
Clamp diameter: 63 mm
Clamp length: 54.5 mm
Camera thread: C-Mount
Weight: 600g
100-BTC-032
Bi-telecentric objective 0.32x
download
Bi-telecentric (object and image side)
Magnification: 0.32x
Field of view (with 1/2" chip): 20.1 x 15.1 mm
Field of view (with 1/1.8" chip): 22.3 x 16.7 mm
Field of view (with 2/3" chip): 26.7 x 20 mm*
* slightly vignetting possible
Distortion: <0.08%
Telecentricity: < 0.08°
Resolution (MTF@70 LP/mm): 45%
Aperture: F8
Depth of focus: 7 mm
Working distance: 71 mm
Dimensions ŘxL: 46 x 146 mm
Clamp diameter: 40 mm
Clamp length: 52 mm
Camera thread: C-Mount
Weight: 380g

 

Specification

Article No.      100-BTC-003           100-BTC-005          100-BTC-006            100-BTC-008            
Magnification0.030.050.060.08
Exact magnific.0.02930.0510.060.081 
1/2“ FOV218x163125x94.1106.7x8079x59.2
1/1.8“ FOV242x180139x104118x8988x65
2/3“ FOV*290x218167x125142x106105x79
 F/#8888
MTF@70LP/MM50505050
Depth of focus [mm]    780253186101
Telecentricity [°]0.050.080.080.08
Distortion [%]0.050.070.070.07
Total tube length 854502446346
 W.D.732415.7354.46255.57
Clamp diameter22011011063
Clamp length [mm]                136.7120.7120.854.5
MountCCCC

   

Article No. 100-BTC-010            100-BTC-016           100-BTC-020            100-BTC-032            
Magnification0.10.160.20.32
Exact magnification0.0980.1570.20.317
1/2“ FOV65x4940.7x30.532x2420.1x15.1
1/1.8“ FOV72x5445x33.835x2722.3x16.7
2/3“ FOV*86x6554x40.542.5x3226.7x20
F/#8888
MTF@70LP/MM50504545
Depth of focus [mm]             6827177
Telecentricity [°]0.080.080.080.08
Distortion [%]0.070.080.080.08
Total tube length296236171146
W.D.209.7150102.570.7
Clamp diameter
63636340
Clamp length [mm]54.554.554.552
MountCCCC


Quadra Mount

Quadra Mount Objektive

Our bi-telecentric objectives are now even more practical: our new QuadraMount versions are equipped as standard with a 4-sided flat profile, enabling easy installation and setup.

Precision, robust alignment of the optical components in any machine vision setup is crucial to the overall optical performance of the system, and msut be carefully considered during the design of an optical measurement system.



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Artikel Nr.
Beschreibung
100-BTC-005-P
Bi-telecentric QuadraMount-objective 0.05x V0.X
download
Bi-telecentric (object and image side)
Magnification: 0.05x
Field of view (with 1/2" chip): 125 x 94.1 mm
Field of view (with 1/1.8" chip): 139 x 104 mm
Field of view (with 2/3" chip): 167 x 125 mm*
* slight vignetting possible
Distortion: <0.07%
Telecentricity: < 0.08°
Resolution (MTF@70 LP/mm): 50%
Aperture: F8
Depth of focus: 253 mm
Working distance: 416 mm
Dimensions ŘxL: 205 x 502 mm
Camera thread: C-Mount
Weight: 7940g
100-BTC-006-P
Bi-telecentric QuadraMount-objective 0.06x V0.X
download
Bi-telecentric (object and image side)
Magnification: 0.06x
Field of view (with 1/2" chip): 106.7 x 80 mm
Field of view (with 1/1.8" chip): 118 x 89 mm
Field of view (with 2/3" chip): 142 x 106 mm*
* slight vignetting possible
Distortion: <0.07%
Telecentricity: < 0.08°
Resolution ( MTF@70 LP/mm): 50%
Aperture: F 8
Depth of focus: 186 mm
Working distance: 355 mm
Dimensions ŘxL: 179 x 446 mm
Camera thread: C-Mount
Weight: 6850g
100-BTC-008-P
Bi-telecentric QuadraMount-objective 0.8x V0.X
download
Bi-telecentric (object and image side)
Magnification: 0.08x
Field of view (with 1/2" chip): 79 x 59.2 mm
Field of view (with 1/1.8" chip): 88 x 65 mm
Field of view (with 2/3" chip): 105 x 79 mm*
* slight vignetting possible
Distortion: <0.07%
Telecentricity: < 0.08°
Resolution ( MTF@70 LP/mm): 50%
Aperture: F 8
Depth of focus: 101 mm
Working distance: 256 mm
Dimensions ŘxL: 141 x 346 mm
Camera thread: C-Mount
Weight: 2890g
100-BTC-010-P
Bi-telecentric QuadraMount-objective 0.10x V0.X
download
Bi-telecentric (object and image side)
Magnification: 0.1x
Field of view (with 1/2" chip): 65 x 49 mm
Field of view (with 1/1.8" chip): 72 x 54 mm
Field of view (with 2/3" chip): 86 x 65 mm*
* slight vignetting possible
Distortion: < 0.07%
Telecentricity: < 0.08°
Resolution (MTF@70 LP/mm): 50%
Aperture: F8
Depth of focus: 68 mm
Working distance: 210 mm
Dimensions ŘxL: 122 x 296mm
Camera thread: C-Mount
Weight : 2630g
100-BTC-016-P
Bi-telecentric QuadraMount-objective 0.16x V0.X
download
Bi-telecentric (object and image side)
Magnification: 0.16x
Field of view (with 1/2" chip): 40.7 x 30.5 mm
Field of view (with 1/1.8" chip): 45 x 33.8 mm
Field of view (with 2/3" chip): 54 x 40.5 mm*
* slight vignetting possible
Distortion: < 0.08%
Telecentricity: < 0.08°
Resolution (MTF@70 LP/mm): 50%
Aperture: F8
Depth of focus: 27 mm
Working distance: 150 mm
Dimensions ŘxL: 120 x 236mm
Camera thread: C-Mount
Weight : 1770g
100-BTC-020-P
Bi-telecentric QuadraMount-objective 0.2x V0.X
download
Bi-telecentric (object and image side)
Magnification: 0.2x
Field of view (with 1/2" chip): 32 x 24 mm
Field of view (with 1/1.8" chip): 35 x 27 mm
Field of view (with 2/3" chip): 42.5 x 32 mm*
* slight vignetting possible
Distortion: < 0.08 %
Telecentricity: < 0.08 %
Resolution (MTF@70 LP/mm): 45%
Aperture: F8
Depth of focus: 17 mm
Working distance: 103 mm
Dimensions ŘxL: 120 x 171mm
Camera thread: C-Mount
Weight : 1530g
100-BTC-032-P
Bi-telecentric QuadraMount-objective 0.32x V0.X
download
Bi-telecentric (object and image side)
Magnification: 0.32x
Field of view (with 1/2" chip): 20.1 x 15.1 mm
Field of view (with 1/1.8" chip): 22.3 x 16.7 mm
Field of view (with 2/3" chip): 26.7 x 20 mm*
* slight vignetting possible
Distortion: < 0.08%
Telecentricity: < 0.08°
Resolution (MTF@70 LP/mm): 45%
Aperture: F8
Depth of focus: 7 mm
Working distance: 71 mm
Dimensions ŘxL: 80 x 146mm
Camera thread: C-Mount
Weight : 800g


Specification

Article No.      100-BTC-005-P      100-BTC-006-P      100-BTC-008-P      100-BTC-010-P      
Magnification0.050.060.080.1
Exact magnific.0.0510.060.0810.098
1/2“ FOV125x94.1106.7x8079x59.265x49
1/1.8“ FOV139x104118x8988x6572x54
2/3“ FOV*167x125142x106105x7986x65
 F/#8888
MTF@70LP/MM50505050
Depth of focus [mm]    25318610168
Telecentricity [°]0.080.080.080.08
Distortion [%]0.070.070.070.07
Total tube length 502446346296
 W.D.415.7354.46255.57209.7
MountCCCC
Weight [kg]7.96.82.82.6



Article No. 100-BTC-016-P         100-BTC-020-P         100-BTC-032-P         
Magnification0.160.20.32
Exact magnification0.1570.20.317
1/2“ FOV40.7x30.532x2420.1x15.1
1/1.8“ FOV45x33.835x2722.3x16.7
2/3“ FOV*54x40.542.5x3226.7x20
F/#888
MTF@70LP/MM504545
Depth of focus [mm]      27177
Telecentricity [°]0.080.080.08
Distortion [%]0.080.080.08
Total tube length236171146
W.D.150102.570.7
MountCCC
Weight [kg]1.71.50.8



Telecentric test bench

Test Bench

The combination of a Bi-telecentric lens and a collimated telecentric illuminator ensures optimised resolution and perfect image quality.

The optimum utilisation of the entire 17mm depth of field of guarantees perfect measurement of round objects such as springs, screws, bottles.
 
Transmitted light configuration allows high speed image acquisition Standard aluminium profile construction enables easy machine integration Can be used in horizontal or vertical orientation


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The Features for easy measurement 

Optimized for 1 1/8“ and 2/3“ C-Mount Cameras
FoV with a 2/3“ camera 42x32mm (52mm Image circle)
Resolution 45% @ 70LP/mm
Field Depth +/-8mm
Telecentricity 0,08
F-No.: F8
Distortion 0,08

All featuring: 

• Integrated 0,2x Bi-Telecentric Objective lens
• Telecentric illuminator (Red, Blue, White)
    ‘M12´ type power cable (1m)
    Input Voltage 24V DC
    Forward Current 700mA
    On/OFF Time 300ys
    Maximum trigger Frequency 300Hz
• Manufactured from standard aluminium profile enabling simple integration
• Complete unit can be vertically or horizontally oriented
• Column length: 550mm
• Target Holder carriage for horizontal and vertical position
• Pre adjusted for precise measurements
• Every unit fully tested


Compact telecentric objectives

Kompakte telezentrische Objektive

Telecentric lenses are used for performing exact measurements of objects due to their ability to image the exact size of an object regardless of its position within the field of view or its distance from the lens.
With their compact size, ultra low optical distortion and economical price, these lenses are the ideal choice for a wide variety of measurement applications where space is a premium.


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Applications & Markets
  • Dimensional measurement of medical devices

  • Biomedical analysis of growth in well plates

  • High resolution gauging of mechanical precision parts
  • 3D measurements of small objects inside machines
Benefits
  • Small and compact for OEM integration

  • Object side telecentric for precise measurement
  • Nearly distortion free with standard C-Mount

Artikel Nr.
Beschreibung
100-CO24-TC05
Compact telecentric Lens 0.5x
download
- F-Number 6
- Working distance 68mm
- Object side telecentricity
- FoV 1/2" chip 12.8 x 9.6 mm
- Length 30.3 mm
- C-Mount
100-CO24-TC075
Compact telecentric Lens 0.75x
download
- F-Number 9
- Working distance 52 mm
- Object side telecentricity
- FoV 1/2" chip 8.5 x 6.4 mm
- Length 35.9 mm
- C-Mount
100-CO24-TC10
Compact telecentric Lens 1.0x
download
- F-Number 12
- Working distance 44 mm
- Object side telecentricity
- FoV 1/2" chip 6.4 x 4.8 mm
- Length 41.8 mm
- Optical resolution 50 LP/mm
- C-Mount

Specification

Article No.100-CO24-TC05         100-CO24-TC10        100-CO24-TC075       
Magnification0.5 x0.75 x1.0 x
W.D. [mm]685244
F-No.6912
Field Depths [mm]       0.30.30.3
Telecentricity0.75°0.05°0.02°
Distortion [%]< 1< 1< 0.1
FoV 1/3“ [mm]9.6 x 7.26.4 x 4.84.8 x 3.6
FoV 1/2“ [mm]12.8 x 9.68.5 x 6.46.4 x 4.8
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