Telecentric Objectives
No perspective Error for Measurement Applications
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.
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
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
100-BTC-003
Bi-telecentric objective 0.03x
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
100-BTC-005
Bi-telecentric objective 0.05x
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 10
100-BTC-006
Bi-telecentric objective 0.06x
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
100-BTC-008
Bi-telecentric objective 0.08x
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 m
100-BTC-010
Bi-telecentric objective 0.1x
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
100-BTC-016
Bi-telecentric objective 0.16x
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
100-BTC-020
Bi-telecentric objective 0.2x
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
100-BTC-032
Bi-telecentric objective 0.32x
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
Specification
| Article No. | 100-BTC-003 | 100-BTC-005 | 100-BTC-006 | 100-BTC-008 |
| Magnification | 0.03 | 0.05 | 0.06 | 0.08 |
| Exact magnific. | 0.0293 | 0.051 | 0.06 | 0.081 |
| 1/2“ FOV | 218x163 | 125x94.1 | 106.7x80 | 79x59.2 |
| 1/1.8“ FOV | 242x180 | 139x104 | 118x89 | 88x65 |
| 2/3“ FOV* | 290x218 | 167x125 | 142x106 | 105x79 |
| F/# | 8 | 8 | 8 | 8 |
| MTF@70LP/MM | 50 | 50 | 50 | 50 |
| Depth of focus [mm] | 780 | 253 | 186 | 101 |
| Telecentricity [°] | 0.05 | 0.08 | 0.08 | 0.08 |
| Distortion [%] | 0.05 | 0.07 | 0.07 | 0.07 |
| Total tube length | 854 | 502 | 446 | 346 |
| W.D. | 732 | 415.7 | 354.46 | 255.57 |
| Clamp diameter | 220 | 110 | 110 | 63 |
| Clamp length [mm] | 136.7 | 120.7 | 120.8 | 54.5 |
| Mount | C | C | C | C |
| Article No. | 100-BTC-010 | 100-BTC-016 | 100-BTC-020 | 100-BTC-032 |
| Magnification | 0.1 | 0.16 | 0.2 | 0.32 |
| Exact magnification | 0.098 | 0.157 | 0.2 | 0.317 |
| 1/2“ FOV | 65x49 | 40.7x30.5 | 32x24 | 20.1x15.1 |
| 1/1.8“ FOV | 72x54 | 45x33.8 | 35x27 | 22.3x16.7 |
| 2/3“ FOV* | 86x65 | 54x40.5 | 42.5x32 | 26.7x20 |
| F/# | 8 | 8 | 8 | 8 |
| MTF@70LP/MM | 50 | 50 | 45 | 45 |
| Depth of focus [mm] | 68 | 27 | 17 | 7 |
| Telecentricity [°] | 0.08 | 0.08 | 0.08 | 0.08 |
| Distortion [%] | 0.07 | 0.08 | 0.08 | 0.08 |
| Total tube length | 296 | 236 | 171 | 146 |
| W.D. | 209.7 | 150 | 102.5 | 70.7 |
Clamp diameter
| 63 | 63 | 63 | 40 |
| Clamp length [mm] | 54.5 | 54.5 | 54.5 | 52 |
| Mount | C | C | C | C |
Quadra Mount
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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100-BTC-005-P
Bi-telecentric QuadraMount-objective 0.05x V0.X
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 10
100-BTC-006-P
Bi-telecentric QuadraMount-objective 0.06x V0.X
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
100-BTC-008-P
Bi-telecentric QuadraMount-objective 0.8x V0.X
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 m
100-BTC-010-P
Bi-telecentric QuadraMount-objective 0.10x V0.X
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
100-BTC-016-P
Bi-telecentric QuadraMount-objective 0.16x V0.X
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
100-BTC-020-P
Bi-telecentric QuadraMount-objective 0.2x V0.X
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)
100-BTC-032-P
Bi-telecentric QuadraMount-objective 0.32x V0.X
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
Specification
| Article No. | 100-BTC-005-P | 100-BTC-006-P | 100-BTC-008-P | 100-BTC-010-P |
| Magnification | 0.05 | 0.06 | 0.08 | 0.1 |
| Exact magnific. | 0.051 | 0.06 | 0.081 | 0.098 |
| 1/2“ FOV | 125x94.1 | 106.7x80 | 79x59.2 | 65x49 |
| 1/1.8“ FOV | 139x104 | 118x89 | 88x65 | 72x54 |
| 2/3“ FOV* | 167x125 | 142x106 | 105x79 | 86x65 |
| F/# | 8 | 8 | 8 | 8 |
| MTF@70LP/MM | 50 | 50 | 50 | 50 |
| Depth of focus [mm] | 253 | 186 | 101 | 68 |
| Telecentricity [°] | 0.08 | 0.08 | 0.08 | 0.08 |
| Distortion [%] | 0.07 | 0.07 | 0.07 | 0.07 |
| Total tube length | 502 | 446 | 346 | 296 |
| W.D. | 415.7 | 354.46 | 255.57 | 209.7 |
| Mount | C | C | C | C |
| Weight [kg] | 7.9 | 6.8 | 2.8 | 2.6 |
| Article No. | 100-BTC-016-P | 100-BTC-020-P | 100-BTC-032-P |
| Magnification | 0.16 | 0.2 | 0.32 |
| Exact magnification | 0.157 | 0.2 | 0.317 |
| 1/2“ FOV | 40.7x30.5 | 32x24 | 20.1x15.1 |
| 1/1.8“ FOV | 45x33.8 | 35x27 | 22.3x16.7 |
| 2/3“ FOV* | 54x40.5 | 42.5x32 | 26.7x20 |
| F/# | 8 | 8 | 8 |
| MTF@70LP/MM | 50 | 45 | 45 |
| Depth of focus [mm] | 27 | 17 | 7 |
| Telecentricity [°] | 0.08 | 0.08 | 0.08 |
| Distortion [%] | 0.08 | 0.08 | 0.08 |
| Total tube length | 236 | 171 | 146 |
| W.D. | 150 | 102.5 | 70.7 |
| Mount | C | C | C |
| Weight [kg] | 1.7 | 1.5 | 0.8 |
Telecentric 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
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
100-CO24-TC05
Compact telecentric Lens 0.5x
- 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
- 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
- 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 |
| Magnification | 0.5 x | 0.75 x | 1.0 x |
| W.D. [mm] | 68 | 52 | 44 |
| F-No. | 6 | 9 | 12 |
| Field Depths [mm] | 0.3 | 0.3 | 0.3 |
| Telecentricity | 0.75° | 0.05° | 0.02° |
| Distortion [%] | < 1 | < 1 | < 0.1 |
| FoV 1/3“ [mm] | 9.6 x 7.2 | 6.4 x 4.8 | 4.8 x 3.6 |
| FoV 1/2“ [mm] | 12.8 x 9.6 | 8.5 x 6.4 | 6.4 x 4.8 |
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