IQ Lens™ System: TL1250P-IQ

Ultra high resolution, long distance telephoto lens
12 - 50 mm focal range
True 4K, 12 megapixel, 300 lp/mm resolution
NIR corrected from 430 to 940nm for Day/Night
Motorized zoom, focus, and iris with optional IR filters and home position limits
Average measured zoom/focus tracking curve and focal length
Design data for distortion, aperture and relative illumination
Software application and GUI for converting engineering units to motor positions
Compact, lightweight design to fit into small enclosures and tight spaces
For 1/1.7" sensor sizes or smaller

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Overview

Available calibration data

The following calibration data frames are provided in a JSON format data file. The calibration curves are monitored from lens lot to lot to verify the continued accuracy of the curves. When a Theia IQ lens™ is purchased, the most recent average data file is provided (available from online download).

Data Frame	Selected: Y axis	X axis
Focus / Zoom tracking*	Focus motor step	Zoom motor step
Focal length conversion*	Zoom motor step	Focal length [mm]
Distortion^	Object angle [deg]	Image height [mm]
Relative illumination^	Illumination [%]	Image height [mm]
Aperture^	Aperture [1/(2*F/#)]	Iris motor step
Iris diameter^	Iris short diameter	Iris motor step

*Average measured data
^Design data

Learn about Theia’s family of individually measured Calibrated lenses, here.

Calibrated lens back focal length (BFL) calibration procedure

Due to the tolerances in the camera sensor and mount positions, there is a difference between the lens best focus position and the calibrated focus position. To mitigate this, the lens focus position should be set visually and compared to the calibrated focus motor step from the data file at several focal lengths. The Back Focal Length (BFL) calibration procedure is described in application note AN004. Depending on the application, a fine focus adjustment may be required for optimal focus.

	TL1250P-IQ N5 CS	TL1250P-IQ N6 CS	TL1250P-IQ 850C N6 CS	TL1250P-IQ 940C N6 CS	TL1250P-IQ 940V N6 CS
Motorized Focus / Zoom	✓	✓	✓	✓	✓
Focus / Zoom Limit Indicator (Photo Interrupter)	✓	✓	✓	✓	✓
Iris Type	P-iris	P-iris	P-iris	P-iris	P-iris
Filter Switch	-	visible / clear	850nm / clear	940nm / clear	visible / 940nm
Mount Type	CS-mount	CS-mount	CS-mount	CS-mount	CS-mount
Calibration Type	Running Average	Running Average	Running Average	Running Average	Running Average

Additional integrated bandpass and longpass filter options may be possible. Other lens versions with different feature combinations are also possible. For more information on these topics, please inquire here: Contact Us

The TL1250P-IQ lenses are compatible with the MCR IQ Motor Control Board.