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LTPRHP3W series
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Projection
Patterns
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Key advantages

  • LED technology for perfectly sharp edges
    Thinner lines, sharper edges and more even illumination than lasers
  • Wide selection of projection patterns available (custom-made upon request)
    Chrome-on-glass patterns with geometrical accuracy down to 2 μm
  • Compatible with any C-mount optics
  • Precise light intensity adjustment
  • Easy LED source replacement
Discover more

Application examples

Lighting specifications Electrical specifications Mechanical specifications
Part
number
Active
area
diameter
Light
color,
peak
wavelength
Illuminance Operating
mode
Supply
voltage
Power
consumption
LED
forward
voltage
typical
(max)
Max
pulse
current
Mount Diameter Length
(mm) (klux) (V) (W) (V) (mA) (mm) (mm)
1 2 3 4 6 6
LTPRHP3W-R 11 red, 625 nm 9 Continuous and strobe 12-24 4.5 2.4 (3) 2000 C 38.5 90.8
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LTPRHP3W-G 11 green, 525 nm 14 Continuous and strobe 12-24 4.5 3.3 (4.0) 2000 C 38.5 90.8
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LTPRHP3W-B 11 blue, 460 nm 3 Continuous and strobe 12-24 4.5 3.3 (4.0) 2000 C 38.5 90.8
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LTPRHP3W-W 11 white, 6000 K 30 Continuous and strobe 12-24 4.5 2.8 (-) 2000 C 38.5 90.8
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LTPRHP3W-IR850 11 IR, 850 nm n.a. Continuous and strobe 12-24 4.5 1.5 (2) 2000 C 38.5 90.8
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Last update 15 Apr 2022

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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 LTRPHP3W, models built-in electronics must be bypassed in order to drive the LED directly.
  3. Tolerance ± 10%
  4. At max forward current. Tolerance is ± 0.06V on forward voltage measurements
  5. Max continuous LED driving current is supplied through the built-in electronics. No external controller is required.
  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
LTPRHP3W Manual
LTPR pattern positioning
Safety warning UV/IR

LTPRHP3W-x models featuring built in electronics with multi-turn trimmer for light intesity dimming and ≈ 3W power intensity.

LTPRHP3W models are designed for continuous mode and integrate built-in electronics that control the current flow through the LED.

LTPRHP3W models integrate a multi-turn trimmer for light intensity control. The built-in electronics can be bypassed in order to directly drive the LED through an external controller.

Projection lens selection

2-3″ C-mount lenses

Telecentric lenses

Projection lens selection

Any C-mount optics for 2/3” sensors (11 mm image diagonal) can be interfaced with LTPRHP3W series to project areas with different sizes. Unless the projection optics introduces significant distortion, the shape of the projected pattern will preserve the features and aspect ratio of the engraved pattern.

The projected area dimensions will be “M” times the original dimensions of the pattern, where M is the optical magnification at which the selected projection lens is operating.

Telecentric lenses for 2/3” sensors can also be interfaced with LTPRHP3W models, thus providing telecentric projection of the pattern and enabling unparalleled performance in 3D measurement applications.

Below follows a list of the projection diameters (D) and the recommended projection distances (P.d.) achieved with different types of optics.

2-3″ C-mount lenses

P.D. @50 @75 @100 @150 @200 @250 @300 @400 @500
mm mm mm mm mm mm mm mm mm
Focal
length
D (Projection diameter)
(mm)
6 mm 81 127 172 264
8 mm 58 (*) 92 127 195 264 333
12 mm 35 (*) 58 (*) 81 127 172 218 264
16 mm 41 (*) 58 (*) 92 (*) 127 161 195 264 333
25 mm 55 (*) 77 (*) 99 (*) 121 (*) 165 209 (*)
35 mm 68 (*) 83 (*) 115 146
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Standard C-mount lenses + LTRHP3W
Standard C-mount lenses + LTRHP3W

(*) = spacers may be needed to compensate back focal length

Telecentric lenses

TC23004 TC23007 TC23009 TC23016 TC23024 TC23036
P.d.(mm) 56.0 60.1 62.2 43.1 67.2 102.5
D.(mm) 5.5 8.3 11.0 20.8 31.4 45.2
TC23048 TC23056 TC23064 TC23072 TC23080 TC23096
P.D.(mm) 132.9 157.8 181.8 226.7 226.7 278.6
D.(mm) 59.8 70.0 80.0 89.9 99.7 117.8
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Bi-telecentric lenses + LTRHP3W
Bi-telecentric lenses + LTRHP3W

Selezione del pattern

Standard patterns

Custom-made patterns

Selezione del pattern

The projection pattern can be easily interchanged by unscrewing the retaining ring that holds the pattern. The pattern outer diameter is 21 mm, while the active projection area is a circle of Ø 11 mm.

The pattern drawing could either cover the entire 11 mm diameter area or be of any shape inscribed within this area (such as a square whose side is 7.78mm or a 8.8x6.6mm rectangle). The projection accuracy depends both on the pattern manufacturing accuracy and the distortion of the projection optics mounted on the projector.

The edge sharpness of the projected pattern depends on both the lens resolution and the engraving technique: laser-engraved patterns (part numbers ending in “L”) or photolithography-engraved patterns (part numbers ending in “P”) can be chosen depending on the type of application.

Standard patterns

Custom-made patterns

Tools & Resources

Resources
2D and 3D models
Image gallery
Video gallery
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