Fast MTF, Distortion and Telecentricity Measurement
OptiBench
Measuring Report
DISTORTION MEASUREMENT according to DIN 58 187 and more...
DIN measurement setup
Serial data acquisition of distortion at one working distance.
OptiBench measurement setup
- Motorized positioning
- Automatic evaluation of depth of focus and working distance
- Use of CCD sensors as high precision scale
- Parallel data acquisition within whole depth of focus
DIN data acquisition
acquisition of few image points:
±10 %, ± 20 %, ± 30 %, ± 50 %, ± 70 %, ± 85 %, ± 100 % of full image height in two orthogonal directions: 24 data points in one plane
OptiBench data acquisition
acquisition of grid crossing points in several imaging planes leeds to acquisition of several thousands data points with smooth gradation of radius and azimuth ranges.
Evaluation of location of optical axis.
Calculation of imaging scale
DIN calculation of paraxial imaging scale beta
Paraxial beta is imaging scale in the very center.
DIN: Evaluation out of image heights at ± 10%, ± 20%, ± 30% of full image height
OptiBench calculation of imaging scale
Matching of imaging scales of all measured points by model function.
Use of optical coordinates results in high accuracy of ßparaxial.
DIN calculation of distortion
Evaluation of radial distortion only
OptiBench calculation of distortion
Calculation of distortion by nonlinear optimization of imaging models.
Location of optical axis leads to evaluation of sagittal and tangential distortion.
Use of averaged imaging scale
Resulting in distortions at optical axis.
Value of distortion is smaller.
More favourable for measuring optics built for image processing.
Correction terms for image processing applications.
High precision dimensional measurement tasks require telecentric elements in the whole imaging setup.
But: Some special objects views require non telecentric imaging.
OptiBench provides correction terms for imaging scale or asymmetric imaging models. Delivery of optics along with measured correction terms and correction model is possible.
Telecentric measurement
Telezentric imaging provides optical path parallel to optical axis in object space and so the imaging scale is independent on working distance.
3D data acquisition with OptiBench
Evaluation of imaging scale dependance on working distance
No manual calculation for the quantification of error of telecentricity.
OptiBench tells you the mrad deviation of the chief ray.
MTF MEASUREMENT according to DIN 58 185 and more...
DIN Measurement setup:
- Serial data acquisition
- Monochromatic MTF
OptiBench measurement setup:
- One-Shot-MTF
- Whitelight or
- Monochromatic illumination
User interface
Grafical user interface
Intuitive user guidance by tabbed layout.
Teach-in editor for measurement setup.
Reproduction of teached measuring routines.
Optional integrated user administration.
Modular client-server-concept
Automated measurements
Multiplattform implementation
Linux-Edition for industrial demanded stability.
WindowsNT-Edition for standard administration.
DIN measurement setup
Serial data acquisition of distortion at one working distance.
OptiBench measurement setup
- Motorized positioning
- Automatic evaluation of depth of focus and working distance
- Use of CCD sensors as high precision scale
- Parallel data acquisition within whole depth of focus
DIN data acquisition
acquisition of few image points:
±10 %, ± 20 %, ± 30 %, ± 50 %, ± 70 %, ± 85 %, ± 100 % of full image height in two orthogonal directions: 24 data points in one plane
OptiBench data acquisition
acquisition of grid crossing points in several imaging planes leeds to acquisition of several thousands data points with smooth gradation of radius and azimuth ranges.
Evaluation of location of optical axis.
Calculation of imaging scale
DIN calculation of paraxial imaging scale beta
Paraxial beta is imaging scale in the very center.
DIN: Evaluation out of image heights at ± 10%, ± 20%, ± 30% of full image height
OptiBench calculation of imaging scale
Matching of imaging scales of all measured points by model function.
Use of optical coordinates results in high accuracy of ßparaxial.
DIN calculation of distortion
Evaluation of radial distortion only
OptiBench calculation of distortion
Calculation of distortion by nonlinear optimization of imaging models.
Location of optical axis leads to evaluation of sagittal and tangential distortion.
Use of averaged imaging scale
Resulting in distortions at optical axis.
Value of distortion is smaller.
More favourable for measuring optics built for image processing.
Correction terms for image processing applications.
High precision dimensional measurement tasks require telecentric elements in the whole imaging setup.
But: Some special objects views require non telecentric imaging.
OptiBench provides correction terms for imaging scale or asymmetric imaging models. Delivery of optics along with measured correction terms and correction model is possible.
Telecentric measurement
Telezentric imaging provides optical path parallel to optical axis in object space and so the imaging scale is independent on working distance.
3D data acquisition with OptiBench
Evaluation of imaging scale dependance on working distance
No manual calculation for the quantification of error of telecentricity.
OptiBench tells you the mrad deviation of the chief ray.
MTF MEASUREMENT according to DIN 58 185 and more...
DIN Measurement setup:
- Serial data acquisition
- Monochromatic MTF
OptiBench measurement setup:
- One-Shot-MTF
- Whitelight or
- Monochromatic illumination
User interface
Grafical user interface
Intuitive user guidance by tabbed layout.
Teach-in editor for measurement setup.
Reproduction of teached measuring routines.
Optional integrated user administration.
Modular client-server-concept
Automated measurements
Multiplattform implementation
Linux-Edition for industrial demanded stability.
WindowsNT-Edition for standard administration.
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