STEMMER IMAGING

Thanks to a cooperation between Sill Optics and Optotune, you can dynamically adjust the working distance of telecentric lenses at a rate of up to 40 times per second.

The working distance on the configurations is linearly proportional to the dioptric power. Due to the influence of the focal length, the magnification is not constant. However, with some calibration adjustments, this small difference can be corrected for consistent accuracy (by adjusting it for the linear behaviour). Due to the telecentricity condition, the aperture of the system can be projected to infinity on the telecentric side.

In an optic side telecentric lens the tunable lens needs to be mounted behind the aperture of the lens (in front of the camera sensor) - please note that this configuration does not allow for the possibility of a bi-telecentric solution.

Specifications

• Sensor size: 1/2" to 35 mm line scan sensor
• Magnifications: 0.133x to 3.0x
• Working distance: Between 79.7 mm and 434.1 mm
• Lens mount: C-mount and M42x1 with 40mm BFD
• Distortion: Max. 0.2% to 0.8%
• Wavelength: 450-680 nm
• Clear aperture: 26mm to 153 mm
• Length: 133.4 mm to 587 mm
• Optotune lens EL-C-16-40-TC: optical power through the Optotune lens -2.0 to +3.0 dpt / control current  -250 to +250mA / power consumption 0 to 0.7 W