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LTPRSM SERIES - 3D LED PATTERN PROJECTORS WITH TILT AND FOCUS ADJUSTMENT

LTPRSM Series are LED Pattern Projectors specifically designed for the most demanding 3D profiling and measurement applications. Triangulation techniques require that structured light be directed onto a sample at a considerable angle from vertical. Tilting the light source pattern becomes essential to ensure that patterned light is properly and homogeneously focused across the entire sample surface. LTPRSM pattern projectors integrate a precision tilting mechanism based on the Scheimpflug criterion. This also ensures that the focus doesn’t change when the pattern is tilted. Moreover, the internal focus mechanism offers the maximum optical throughput. The projected light path is effectively coupled to the pupil aperture of any C-mount lens.

KEY ADVANTAGES:

  • Scheimpflug tilt adjustment
    for homogeneous focusing of the pattern features
  • Tilt adjustment compatible with C-mount optics
    focus is maintained even when the pattern is tilted
  • Light Condenser focusing mechanism
    for excellent optical coupling and light throughput
  • Enhanced optical power
    due to the high numerical aperture condenser lens
LTPRSM series - Without tilt adjustment, the pattern features are only partly focused LTPRSM series - With the Scheimpflug adjustment, focus is retained across the entire plane
Without tilt adjustment, the pattern features are only partly focused With the Scheimpflug adjustment, focus is retained across the entire plane

 

Examples of 3D measurement set-ups

Examples of 3D measurement set-ups - img 1 Examples of 3D measurement set-ups - img 2 Examples of 3D measurement set-ups - img 3
LTPRSM pattern projector with a standard C-mount lens Bi-Telecentric lenses used for both projection and vision 90° configuration with zero distortion macro lenses

 

Projection lens selection Original pattern features Projection area with a bi-telecentric lens Projection area with a macro lens
Original pattern features Projection area with a bi-telecentric lens Projection area with a macro lens

LTPRSM units can interface to any type of optics, but the best results are achieved with bi-telecentric lenses.
The projection area is undistorted since tilting the pattern only causes a linear extension along one direction.
Very good results can also be obtained with zero distortion macro lenses; here, the magnification changes along both axes, but image resolution and distortion are such that 3D reconstruction can still be easily performed.
With non bi-telecentric lenses, a square pattern becomes a trapezoid in the projection plane, whose parallel sides are indicated as "w" and "W" in the "MACRO" example above.

 

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Optical Properties Device Power Ratings Led Power Ratings
Part Number Light Color, peak wavelenght Output Flux (lumen) Minimum DC Voltage
(volt)		 Maximum DC Voltage
(volt)		 Power Consumption (watt) Forward Voltage (volt) Forward Current (mA) Pulse Ratings
@0,1 duty/1kHz (mA)		 Datasheets & Drawings Get a quotation
LTPRSM3W/R red, 630 nm 11,4 12,0 24,0 < 2 2,3 350,0 < 1800 LTPRSM3W/R
LTPRSM3W/G green, 520 nm 19 12,0 24,0 < 2 3,5 350,0 < 1800 LTPRSM3W/G
LTPRSM3W/B blue, 460 nm 4,5 12,0 24,0 < 2 3,5 350,0 < 1800 LTPRSM3W/B
LTPRSM3W/W white 21 12,0 24,0 < 2 3,5 300,0 < 1800 LTPRSM3W/W

 

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