LensCheck™, a compact, efficient, and user-friendly image quality evaluation and quality control tool, is designed for measuring optical lenses with an entrance pupil diameter not exceeding 50mm. It is applicable to visible light, short-wave infrared, and long-wave infrared bands. Equipped with patented VideoMTF image analysis software, LensCheck™ offers real-time MTF measurement and analysis capabilities, significantly enhancing measurement efficiency and meeting the certification needs of production and prototype lenses. It is widely used by optical manufacturing companies and research institutions worldwide.
-
LensCheck™ Features
·The patented VideoMTF® technology enables real-time MTF measurement
·A flexibly scalable platform capable of handling a wider range of measurements (such as MTF, EFL, distortion)
·Industry-leading measurement accuracy:
VIS is better than 2%; 1% MTF repeatability (verified through a 50mm f/4 test lens).
LWIR is better than 3% at 40lp/mm; with a 2% repeatability (verified through a 25mm f/1.5 inspection lens).
·Configurable automatic measurement program
·Easily switch between different wavebands (VIS/NIR, SWIR, or LWIR)
-
Measurable parameters
·MTF - On-axis / Off-axis
·EFL (Effective Focal Length) and F/#
·Back focal length
·Astigmatism
·Field curvature
·Distortion
·Chief ray angle
·Energy concentration (square energy / circular energy)
·Axial and sagittal chromatic aberration (APO relay lenses and reflective collimators are recommended)
·Transmittance (optional) - LC-TK transmittance kit is required
·Relative illuminance (optional) - Requires LC-RI relative illuminance kit
·Stray light (optional) - Requires LC-SLK stray light kit
·Glare Spread Function (Optional) - Requires LC-GSF Upgrade Kit
·Line of sight axis (optional) - requires LC-RLM 360-degree rotating lens mount
-
LensCheck™ System Specifications
-
System layout
1、light source
Provide a wide-band light source with a wavelength range from 0.4 microns to 1 micron
2、Manual target and manual filter wheel
·8-position manual target wheel (standard) - calibration target, pinhole, USAF 1951 resolution test target
·8-position manual filter wheel (standard) - brightfield, 546 nm bandpass filter, infrared cut filter, RGB filter set
·(2) empty slots, other filters available upon request
· Automatic shutter (standard configuration)
3、Collimator
Provide a target at infinity for the lens under test in the collimated beam.
·355 mm EFL refractive type (standard configuration)
·Optional reflective collimator
·40X NA0.65 achromatic objective lens (standard configuration)
·You can choose a common apochromatic objective lens
4、Lens mount / accessories
Fix the lens under test in the collimated beam.
·Optional rotating lens mount
·Factory-calibrated lens mounting bracket (standard configuration)
·Three-jaw chuck base and C-type mounting plate for tower (standard configuration)
·Offers over 20 installation options and adapter boards
·Optional thermal module upgrade
5、Rotating platform
Rotate the tested lens and visible image analyzer so that the collimated beam is incident at different angles for off-axis measurements.
·Full field of view ±105°
6、Image Analyzer
The image from the lens under test is relayed and magnified onto a CMOS array for image analysis using OpTest®7 software.
·The standard configuration includes a 40x 0.65NA achromatic lens, with an optional APO apochromatic objective lens
7、Image analyzer bracket
Move the visible image analyzer along the Z axis (the optical axis direction of the testing device) to set the image plane position; and move it along the X and Y axes to track the image during the measurement of off-axis field points.
·Standard 25 mm X-axis displacement stage
·Upgradable to an X-axis displacement stage with a travel range of 100 mm
·Standard guide rail (500 mm)
·Extended guide rail (700 mm)
-
Customized measurement configuration
