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LTPRSMHP3W series

3W tilting LED pattern projectors

Opto Engineering® CATALOG

Overview

Models

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Tech info

Electrical info

Projection

Patterns

Resources

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°.

LTPRSM pattern projector with a standard C-mount.

Configuration with bi-telecentric lenses.

Configuration with zero distorsion macro lenses.

Without tilt adjustment the pattern features are only partly focused.

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

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

Technical documents

Product user guide

pdf

LTPRSMHP3W Manual

pdf

LTPRSMHP3W pattern positioning

pdf

Safety warning UV/IR

pdf

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.

Typical emission spectrum of white

Typical 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 area with a bi-telecentric lens

Projection area with a macro lens

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