LTPR series consists of different LED pattern projectors available with three power intensities and four wavelengths designed for the most demanding structured light applications including 3D profilometry, stereovision, and alignment.

LTPR series consists of LTPRHP3W models featuring = 3W power intensity, LTPRXP models featuring = 10W power intensity designed for continuos mode operation and LTPRUP models designed for strobe-only operation with peak power intensity of = 90W.

Unlike laser sources, our LED pattern projectors ensure sharp edges and homogeneous light without scattering and diffraction effects. Several projections patterns can be easily interchanged to project any kind of shape. Additionally LTPR fetaures built in phase- adjustment for easy alignment of the pattern. Any C-mount optics can be interfaced with LTPR series to project areas with different sizes.

KEY ADVANTAGES

LED technology for perfectly sharp edge
LTPR series ensures thinner lines, sharper edges and more homogeneous illumination than lasers.
With laser emitters the illumination decays both across the line cross section and along the line width.
Laser emitters lines are thicker and show blurred edges; diffraction and speckle effects are also present.
3W, 10W or 90W strobe options.
Wide selection of projection patterns available (custom made upon request).
Compatible with any C-mount optics.

LED PATTERN PROJECTORS

	Optical Specification			Electrical Specification								Mechanical Specifications				Compatibility
Part number	Light color, Wavelength peak	Spectral FWHM	Illuminance	Operation mode	Supply voltage	LED driving current,max		Power consumption	Pulse width	Estimated MTBF	Connection type	External	Length	Width	Height	Strobe controllers	Lenses	Cable	Clamping mechanics	Projection patterns
		(nm)	(klux)		(V)	(mA)						Ø(mm)	(mm)	(mm)	(mm)
			1	2	3	4	5-6		7	8	9		10
LTPRHP3W-WLED pattern projector 3W, HP, white	white	n.a.	30	continuous and pulsed mode	12 – 24	720	2000	< 4.5	≤ 10	> 100000	M8 industrial male connector	37.5	130.4	-	-	LTDV1CH-17V LTDVE8CH-20 LTDVE4CH-20	EN2MP series, EN5MP series, TC series, TCLWD series, TCHM series	CB244P1500, CB244P1500L	-	PTPR series	Info
LTPRHP3W-RLED pattern projector 3W, HP, red	red, 630 nm	15	9	continuous and pulsed mode	12 – 24	720	2000	< 4.5	≤ 10	> 100000	M8 industrial male connector	37.5	130.4	-	-	LTDV1CH-17V LTDVE8CH-20 LTDVE4CH-20	EN2MP series, EN5MP series, TC series, TCLWD series, TCHM series	CB244P1500, CB244P1500L	-	PTPR series	Info
LTPRHP3W-GLED pattern projector 3W, HP, green	green, 520 nm	40	14	continuous and pulsed mode	12 – 24	720	2000	< 4.5	≤ 10	> 100000	M8 industrial male connector	37.5	130.4	-	-	LTDV1CH-17V LTDVE8CH-20 LTDVE4CH-20	EN2MP series, EN5MP series, TC series, TCLWD series, TCHM series	CB244P1500, CB244P1500L	-	PTPR series	Info
LTPRHP3W-BLED pattern projector 3W, HP, blue	blue, 460 nm	20	3	continuous and pulsed mode	12 – 24	720	2000	< 4.5	≤ 10	> 100000	M8 industrial male connector	37.5	130.4	-	-	LTDV1CH-17V LTDVE8CH-20 LTDVE4CH-20	EN2MP series, EN5MP series, TC series, TCLWD series, TCHM series	CB244P1500, CB244P1500L	-	PTPR series	Info
LTPRXP-WHigh Power LED pattern projector, white	white	n.a.	85	continuous mode only	24	700	n.a.	< 13	n.a.	> 65000	M8 industrial male connector	105	158.8	-	-	-	EN2MP series, EN5MP series	CB244P1501, CB244P1501L	-	PTPR series	Buy now
LTPRXP-RHigh Power LED pattern projector, red	red, 630 nm	20	40	continuous mode only	24	700	n.a.	< 13	n.a.	> 65000	M8 industrial male connector	105	158.8	-	-	-	EN2MP series, EN5MP series	CB244P1501, CB244P1501L	-	PTPR series	Buy now
LTPRXP-GHigh Power LED pattern projector, green	green, 520 nm	40	68	continuous mode only	24	700	n.a.	< 13	n.a.	> 65000	M8 industrial male connector	105	158.8	-	-	-	EN2MP series, EN5MP series	CB244P1501, CB244P1501L	-	PTPR series	Buy now
LTPRXP-BHigh Power LED pattern projector, blue	blue, 460 nm	25	9	continuous mode only	24	700	n.a.	< 13	n.a.	> 65000	M8 industrial male connector	105	158.8	-	-	-	EN2MP series, EN5MP series	CB244P1501, CB244P1501L	-	PTPR series	Buy now
LTPRUP-W90W strobed LED pattern projector white	white, 6000 K	n.a.	170	strobe only, constant current driving	n.a.	n.a.	17000	=90 (strobe peak led source power)	≤ 1	> 50000	M12 industrial male connector	37.7	108.9	46	93	LTDV1CH-17V LTDV6CH LTDVE8CH-20 LTDVE4CH-20	EN2MP series, EN5MP series, ENVF series, TC series, TCLWD series, TCHM series	CBLT001, CBLT002	CMHO016	PTPR series	Buy now
LTPRUP-R90W strobed LED pattern projector red	red, 618nm	20	65	strobe only, constant current driving	n.a.	n.a.	17000	=90 (strobe peak led source power)	≤ 1	> 50000	M12 industrial male connector	37.7	108.9	46	93	LTDV1CH-17V LTDV6CH LTDVE8CH-20 LTDVE4CH-20	EN2MP series, EN5MP series, ENVF series, TC series, TCLWD series, TCHM series	CBLT001, CBLT002	CMHO016	PTPR series	Buy now
LTPRUP-G90W strobed LED pattern projector green	green, 525nm	40	220	strobe only, constant current driving	n.a.	n.a.	17000	=90 (strobe peak led source power)	≤ 1	> 50000	M12 industrial male connector	37.7	108.9	46	93	LTDV1CH-17V LTDV6CH LTDVE8CH-20 LTDVE4CH-20	EN2MP series, EN5MP series, ENVF series, TC series, TCLWD series, TCHM series	CBLT001, CBLT002	CMHO016	PTPR series	Buy now
LTPRUP-B90W strobed LED pattern projector blue	blue, 460nm	30	20	strobe only, constant current driving	n.a.	n.a.	17000	=90 (strobe peak led source power)	≤ 1	> 50000	M12 industrial male connector	37.7	108.9	46	93	LTDV1CH-17V LTDV6CH LTDVE8CH-20 LTDVE4CH-20	EN2MP series, EN5MP series, ENVF series, TC series, TCLWD series, TCHM series	CBLT001, CBLT002	CMHO016	PTPR series	Buy now

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 LTRPHP3W, models built-in electronics must be bypassed in order to drive the LED directly.
LTRPHP3W and LTPRXP models have tolerance ± 10%.
Max continuous LED driving current is supplied through the built-in electronics. No external controller is required (only LTRPHP3W and LTPRXP models).
At max LED pulsed current, max LED foward voltage (V) = 3.00 for LTRPHP3W-R, 4.00 for LTRPHP3W-G/B, 3.4 for LTRPHP3W-W (only LTRPHP3W models).
To directly drive the LED, current control is necessary. External compatible controller from LTDV series must be used (only LTPRXP models).
At pulse width ≤ 10 ms, duty cycle ≤ 10% condition. Built-in electronics must be byepassed (only LTRPHP3W models). At 25°C. At max pulse width (1 ms), max pulse frequency = 15 Hz. Contact us to check other allowable combinations of duty cycle-frequency-temperature (only LTPRUP models).
LTRPHP3W models at 55 °C, 720mA. LTPRXP models at 110 °C. LTPRUP models at 25 °C.
- LTRPHP3W models: 2m cable with straight female connector included (CB244P1500). Optional cable with right angled connector CB244P1500L is also available and must be ordered separately.
- LTPRXP models: 2m cable with straight female connector included (CB244P1501). Optional cable with right angled connector CB244P1501L is also available and must be ordered separately.
- LTPRUP models: 5m cable with straight female connector included (CBLT001). Optional cable with right angled connector CBLT002 is also available and must be ordered separately.
Including connector.

Technical documents

Data table

XLS

LTPRHP3W Product user guide

LTPRSMHP3W Product user guide

LTPRXP Product user guide

Product user guide

LTPR pattern positioning

Safety warning UV/IR

Projection lens selection

Compatible products

EN2MP series

Megapixel fixed focal lenses for 2/3” sensors

EN5MP series

5 Megapixel high resolution fixed focal lenses for 2/3” sensors

PTPR series

Projection patterns for machine vision

CMHO016

Clamping mechanics for TCxx016 lenses and LTCLHP016-X illuminators

TC series

Bi-telecentric lenses for matrix detectors up to 2/3″

TCLWD series

Long working distance telecentric lenses for 2/3″ detectors

TCHM series

High magnification telecentric lenses for detectors up to 2/3″

ENVF series

Vari-focal lenses for detectors up to 2/3″

CBLT001

Illumination cable PVC black, side 1 M12 connector straight, side 2 cable end - 5 m - for single stage systems

CBLT002

Illumination cable PVC black, side 1 M12 connector right angled, side 2 cable end - 5 m - for single stage systems

CB244P1500

Power cable, side 1 M8 connector straight, side 2 cable end - 2 m - type 1 labels

CB244P1500L

Power cable, side 1 M8 connector angled, side 2 cable end - 2 m - type 1 labels

CB244P1501

Power cable, side 1 M8 connector straight, side 2 cable end - 2 m - type 2 labels

CB244P1501L

Power cable, side 1 M8 connector angled, side 2 cable end - 2 m - type 2 labels

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

LTPRHP3W and LTPRXP 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 dimming while LTPRXP models have fixed current and cannot be dimmed. For LTPRHP3W models, the built-in electronics can be bypassed in order to directly drive the LED through an external controller.

LTPRXP-x models featuring built in electronics, fixed current output and ≈ 10W power intensity.

LTPRUP series are the most powerful LED pattern projectors available from Opto Engineering®. These models are used in high speed applications where camera exposure time must be set to the minimum, including planarity control of opaque products and 3D profiling. LTPRUP models are designed for strobe-mode only and can be precisely controlled using compatible LTDV strobe controllers series. LTDV controllers are designed to drive the LED of LTPRUP pattern projectors with perfectly constant current, ensuring repeatable results even when low exposure time is required.

LTPRUP-x models for strobe-only operation featuring ≈ 90W peak power intensity. These models are compatible with CMHO016 clamping mechanics, alternatively three M4 and one M6 threads are available as fixing options.

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

Projection lens selection

Any C-mount optics for 2/3” detectors (11 mm image diagonal) can be interfaced with LTPR series to project areas with different sizes by means of the mount adaptor included. 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” detectors can also be interfaced with LTPRHP3W and LTPRUP models, thus providing telecentric projection of the pattern and enabling unparalleled performance in 3D measurement applications.

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

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

Standard C-mount lenses + LTRHP3W

Standard C-mount lenses + LTRXP

Standard C-mount lenses + LTRUP

Telecentric lenses
	TC 23 004	TC 23 007	TC 23 009	TC 23 016	TC 23 024	TC 23 036
P.d.(mm)	57.1	61.2	63.3	45.3	69.2	103.5
D.(mm)	5.5	8.3	11.0	20.8	31.4	45.2
	TC 23 048	TC 23 056	TC 23 064	TC 23 072	TC 23 080	TC 23 096
P.D.(mm)	134.6	159.3	182.3	227.7	227.7	279.6
D.(mm)	59.8	70.0	80.0	89.9	99.7	117.8

Bi-telecentric lenses + LTRHP3W

Bi-telecentric lenses + LTRUP

Pattern selection

Custom-made pattern

Custom-made patterns can be supplied on request.

A drawing with accurate geometrical information must be submitted (please refer to the instructions here below)

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 LTPR models.

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.

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Application examples

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