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  • Home
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  • LTPRSMHP3W series

LTPRSMHP3W series

3W tilting LED pattern projectors

Opto Engineering® CATALOG

Overview
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LTPRSMHP3W series are LED pattern projectors specifically designed for the most demanding 3D profiling and measurement applications. Triangulation techniques require that structured light is directed onto a sample at a considerable angle from vertical. Tilting the light source pattern becomes essential to ensure that the patterned light is properly focused across the entire sample surface. 

LTPRSMHP3W pattern projectors integrate a precision tilting mechanism based on the Scheimpflug condition. This ensures that focus is maintained across the entire part, and reconstruction of the 3d surface is as accurate as possible. Moreover, the internal focus mechanism offers the maximum optical throughput.

KEY ADVANTAGES

  • Scheimpflug 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
    High numerical aperture condenser lens.
LED PATTERN PROJECTORS
LTPRSMHP3W LED pattern projector green light

Examples of setup applications

Scheimpflug telecentric optics for both projection and imaging at 90°.
Scheimpflug telecentric optics for both projection and imaging at 90°.
LTPRSM pattern projector with a standard C-mount.
LTPRSM pattern projector with a standard C-mount.
Configuration with bi-telecentric lenses.
Configuration with bi-telecentric lenses.
Configuration with zero distorsion macro lenses.
Configuration with zero distorsion macro lenses.

Without tilt adjustment the pattern features are only partly focused.
Without tilt adjustment the pattern features are only partly focused.
With the Scheimpflug adjustment focus is maintained across the entire plane.
With the Scheimpflug adjustment focus is maintained across the entire plane.
Lighting specifications Electrical specifications Mechanical specifications
Part
number
Active
area
Max
pattern
tilt
Light
color,
peak
wavelength
Illuminance Operating
mode
Supply
voltage
Power
consumption
LED
forward
voltage
typical
(max)
Max
pulse
current
Mount Diameter Length
(mm x mm) (deg) (klux) (V) (W) (V) (mA) (mm) (mm)
1 2 3 4 6
LTPRSMHP3W-R 8 x 8 45 red, 625 nm 9 Continuous and strobe 12-24 4.5 2.4 (3) 2000 C 38.5 90.8 Quote
LTPRSMHP3W-G 8 x 8 45 green, 525 nm 14 Continuous and strobe 12-24 4.5 3.3 (4.0) 2000 C 38.5 90.8 Quote
LTPRSMHP3W-B 8 x 8 45 blue, 460 nm 3 Continuous and strobe 12-24 4.5 3.3 (4.0) 2000 C 38.5 90.8 Quote
LTPRSMHP3W-W 8 x 8 45 white, 6000 K 30 Continuous and strobe 12-24 4.5 2.8 (-) 2000 C 38.5 90.8 Quote
Last update 15 Apr 2022

Notes

  1. With a 35 mm lens, F/N 1.4 at 100 mm working distance without projection pattern at maximum driving current. Estimated value.
  2. To pulse LTRPSMHP3W, models built-in electronics must be bypassed in order to drive the LED directly.
  3. Tolerance ± 10%
  4. Max continuous LED driving current is supplied through the built-in electronics. No external controller is required.
  5. At max forward current. Tolerance is ± 0.06V on forward voltage measurements
  6. At pulse width <= 10 ms and duty cycle <= 10%. Built-in electronics board must be bypassed (see tech info)
  7. At 55 °C, 720mA.

Technical documents

Product user guide
pdf
LTPRSMHP3W Manual
pdf
LTPRSMHP3W pattern positioning
pdf
Safety warning UV/IR
pdf
spinner

If you are looking for a matching lens, see our optics with Scheimflug adjustment

TCSM telecentric lens with 3D Scheimpflug adjustment

TCSM series

3D bi-telecentric lenses with Scheimpflug adjustment
MCSM macro 3D lens with Scheimpflug adjustment

MCSM1-01X

Variable macro lens with Scheimpflug adjustment

For high precision control of our LED lightings, see our range of LED controllers

Strobe controllers

LTDV series

LED Strobe controllers
LTIC Series main image

LTIC series

LED lighting controllers

To power our pattern projectors, refer to

power_supply

PS series

Power supplies

Some related accessories you might be interested in

Projection patterns

PTPR series

Projection patterns for LED projectors

LTPRHP3W Electrical features

These LED devices integrate built-in switching electronics that control the current flow through the LED and which can be easily tuned by the user. This ensures both high light stability and a longer lifetime of the product.

The inner circuitry can be bypassed in order to directly drive the LED. Simply connect the black and blue wires to your power supply instead of the black and brown ones, ensuring that the maximum rates are not exceeded.

Electrical tuning
Electrical tuning

Typical emission spectrum of white

Emission spectrum of white LEDs

Typical emission spectrum of RGB LEDs

Emission spectrum of RGB LEDs

LTPRSM series units can be interfaced with any type of optics, but the best results are achieved with bi-telecentric lenses.
The projection area is undistorted since tilting the pattern causes a linear extension along only one direction.

Excellent results can also be obtained with zero distortion macro lenses; here, the magnification changes along both axes, but image resolution and distortion still easily allows 3D reconstruction.

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 drawings below.

The projection area shown in the chart are also a good approximation for standard C-mount lenses used as macro lenses (eventually equipped with spacers).

Original pattern features
projection_02 Projection area with a bi-telecentric lens
projection_03 Projection area with a macro lens
Projection distance

Projection area with bi-telecentric lenses (TC series)

ϑ = 0° ϑ = 15° ϑ = 30° ϑ = 45°
Part
number
Projection
distance
Projection
area
Pattern
tilt
Projection
area
Pattern
tilt
Projection
area
Pattern
tilt
Projection
area
Pattern
tilt
P.d. W x h ϑ’ W x h ϑ’ W x h ϑ’ W x h ϑ’
(mm) (mm x mm) (deg) (mm x mm) (deg) (mm x mm) (deg) (mm x mm) (deg)
TC23009 63.3 8.0 x 8.0 0 8.0 x 8.0 15 8.0 x 8.0 30.0 8.0 x 8.0 45.0
TC23016 45.3 15.2 x 15.2 0 15.2 x 15.4 8.01 15.2 x 16.8 17.0 15.2 x 20.0 27.8
TC23024 69.2 22.9 x 22.9 0 22.9 x 23.6 5.4 22.9 x 26.0 11.4 22.9 x 30.5 19.3
TC23036 103.5 32.9 x 32.9 0 32.9 x 34.0 3.7 32.9 x 37.7 8.0 32.9 x 45.3 13.6
TC23048 134.6 43.3 x 43.3 0 43.3 x 44.7 2.8 43.3 x 49.8 6.1 43.3 x 60.3 10.5
TC23056 159.3 51.0 x 51.0 0 51.0 x 52.8 2.4 51.0 x 58.6 5.01 51.0 x 71.3 8.8
TC23064 182.0 58.2 x 58.2 0 58.2 x 60.3 2.1 58.2 x 67.1 4.5 58.2 x 81.7 7.8
TC23080 227.0 72.7 x 72.7 0 72.7 x 73.8 1.7 72.7 x 83.6 3.6 72.7 x 102.0 6.3
TC23096 279.0 85.6 x 85.6 0 85.6 x 88.6 1.04 85.6 x 98.7 3.1 85.6 x 120.9 5.3

Projection area with macro (MC3-03x and MC series) and standard lenses

ϑ = 0° ϑ = 15° ϑ = 30° ϑ = 45°
Mag. Projection
distance
Projection
area
Pattern
tilt
Projection
area
Pattern
tilt
Projection
area
Pattern
tilt
Projection
area
Pattern
tilt
Suggested
Macro lenses
w (W) x h ϑ’ w (W) x h ϑ’ w (W) x h ϑ’ w (W) x h ϑ’
(x) (mm) (mm) (mm x mm) (deg) (mm) (mm x mm) (deg) (mm) (mm x mm) (deg) (mm) (mm x mm) (deg)
1.00 46.0 8.0 (8.0) x 8.0 0 7.7 (8.3) x 8.0 15.0 7.5 (8.6) x 8.1 30.0 7.3 (8.9) x 8.1 45.0 MC3-03X, MC100X
0.75 48.0 10.7 (10.7) x 10.7 0 10.3 (11.1) x 10.9 11.4 10.0 (11.6) x 11.4 23.5 9.6 (12.1) x 12.3 37.0 MC3-03X, MC075X
0.50 60.0 16.1 (16.1) x 16.1 0 15.5 (16.7) x 16.5 7.6 14.9 (17.5) x 17.9 16.2 14.3 (18.4) x 20.7 26.7 MC3-03X, MC050X
0.33 92.0 24.3 (24.3) x 24.3 0 23.4 (25.3) x 25.1 5.1 22.5 (26.5) x 27.8 10.8 21.4 (28.1) x 33.3 18.3 MC3-03X, MC033X
0.20 136.0 40.1 (40.1) x 40.1 0 38.6 (41.6) x 42.1 3.1 37.0 (43.6) x 46.2 6.6 35.1 (46.6) x 56.8 11.4 MC3-03X
0.10 275.0 79.5 (79.5) x 79.5 0 76.6 (82.6) x 82.4 1.6 73.5 (86.6) x 92.3 3.4 69.6 (92.6) x 114.2 5.8 MC3-03X

About projection patterns

The projection pattern placed inside the unit can be changed and integrated with ease: just remove the C-mount adaptor by loosening the set-screws and fix the pattern by screwing the retaining ring.

Different types of stripe and grid patterns are available; the chart below shows the line thickness (0.05 mm) and the gap between neighboring lines for each pattern type.

When these features are projected, they become 1/M times larger, with “M” being the magnification of the projection lens. The number of lines mentioned after each part number indicates the number of features on the active area of the pattern.

Photolitography patterns

Substrate Soda lime grass
Coating Chrome
Geometrical accuracy 2 μm
Edge sharpness 1.4 μm

With LTPRHP, LTPRXP and LTPRUP projectors
(circular aperture)
With LTPRSMHP projectors
(square aperture)
Format Process Substrate Coating Line
spacing
Thickness Geometrical
accuracy
Edge
sharpness
Active
area
Number
of lines
Max line
length
Active
area
Number
of lines
Line
length
(mm) (mm) (µm) (µm) (mm) (mm) (mm x mm) (mm)
PT00000100PSingle line projection pattern, Photolitography Line Photolitography Soda lime glass Chrome - 0.05 2 1.4 11 1 11 8 x 8 1 8 Quote
PT00000100LSingle line projection pattern, Laser engraving Line Laser engraving Borofloat glass Dichroic mirror - 0.5 50 50 11 1 11 8 x 8 1 8 Quote
PT00000200PCross projection pattern, Photolitography Cross Photolitography Soda lime glass Chrome - 0.05 2 1.4 11 - 11 8 x 8 - 8 Quote
PT00000200LCross projection pattern, Laser engraving Cross Laser engraving Borofloat glass Dichroic mirror - 0.5 50 50 11 - 11 8 x 8 - 8 Quote
PT00000300PStripes projection pattern, Photolitography Stripes Photolitography Soda lime glass Chrome 0.95 0.05 2 1.4 11 8 7.78 8 x 8 8 7.78 Quote
PT00000300LStripes projection pattern, Laser engraving Stripes Laser engraving Borofloat glass Dichroic mirror 0.5 0.5 50 50 11 8 7.78 8 x 8 8 7.78 Quote
PT00000400PGrid projection pattern, Photolitography Grid Photolitography Soda lime glass Chrome 0.95 0.05 2 1.4 11 8 x 8 7.78 8 x 8 8 x 8 7.78 Quote
PT00000400LGrid projection pattern, Laser engraving Grid Laser engraving Borofloat glass Dichroic mirror 0.8 0.2 50 50 11 8 x 8 7.78 8 x 8 8 x 8 7.78 Quote
PT00000500PEdge projection pattern, Photolitography Edge Photolitography Soda lime glass Chrome - - 2 1.4 11 - - 8 x 8 - - Quote
PT00000500LEdge projection pattern, Laser engraving Edge Laser engraving Borofloat glass Dichroic mirror - - 50 50 11 - - 8 x 8 - - Quote
PTST050450PStripes projection pattern, Photolitography Stripes Photolitography Soda lime glass Chrome 0.45 0.05 2 1.4 11 22 11 8 x 8 16 8 Quote
PTST050200PStripes projection pattern, Photolitography Stripes Photolitography Soda lime glass Chrome 0.2 0.05 2 1.4 11 44 11 8 x 8 32 8 Quote
PTST050100PStripes projection pattern, Photolitography Stripes Photolitography Soda lime glass Chrome 0.1 0.05 2 1.4 11 73 11 8 x 8 53 8 Quote
PTST050050PStripes projection pattern, Photolitography Stripes Photolitography Soda lime glass Chrome 0.05 0.05 2 1.4 11 110 11 8 x 8 80 8 Quote
PTST010010PStripes projection pattern, Photolitography Stripes Photolitography Soda lime glass Chrome 0.01 0.01 2 1.4 11 550 11 8 x 8 400 8 Quote
PTST020020PStripes projection pattern, Photolitography Stripes Photolitography Soda lime glass Chrome 0.02 0.02 2 1.4 11 275 11 8 x 8 200 8 Quote
PTGR050450PGrid projection pattern, Photolitography Grid Photolitography Soda lime glass Chrome 0.45 0.05 2 1.4 11 22 x 22 11 8 x 8 16 x 16 8 Quote
PTGR050200PGrid projection pattern, Photolitography Grid Photolitography Soda lime glass Chrome 0.2 0.05 2 1.4 11 44 x 44 11 8 x 8 32 x 32 8 Quote
PTGR050100PGrid projection pattern, Photolitography Grid Photolitography Soda lime glass Chrome 0.1 0.05 2 1.4 11 73 x 73 11 8 x 8 53 x 53 8 Quote
PTGR050050PGrid projection pattern, Photolitography Grid Photolitography Soda lime glass Chrome 0.05 0.05 2 1.4 11 110 x 110 11 8 x 8 80 x 80 8 Quote
PTCD010PCloud of dots, density 10.5% projection pattern, Photolitography Cloud of dots pattern
density 10.5%
Photolitography Soda lime glass Chrome - - 2 1.4 11 - - 8 x 8 - - Quote
PTCD020PCloud of dots, density 20% projection pattern, Photolitography Cloud of dots pattern
density 20%
Photolitography Soda lime glass Chrome - - 2 1.4 11 - - 8 x 8 - - Quote
PTCD035PCloud of dots, density 35% projection pattern, Photolitography Cloud of dots pattern
density 35%
Photolitography Soda lime glass Chrome - - 2 1.4 11 - - 8 x 8 - - Quote

Video gallery

Find more videos on our Vimeo channel

Product images

LTPRSM pattern projector with a standard C-mount lens

Bi-telecentric lenses used for both projection and vision.

Configuration with zero distortion macro lenses

Tools and resources

2D and 3D models
Image gallery
Video gallery
Glossary

See also

TCSM series
MCSM1-01X
Company & Resources
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