LTCLHP series are high-performance telecentric illuminators specifically designed to back illuminate objects imaged by telecentric lenses. This high performance series provides:

Excellent illumination stability featuring no light flickering thanks to very high current stability over time even at low currents.
Precise light intensity tuning thanks to the leadscrew multi-turn trimmer positioned in the back.
Easy LED source replacement and alignment for all the LED colors offered by Opto Engineering®.

LTCLHP telecentric illuminators offer higher edge contrast when compared to diffused back light illuminators and therefore higher measurement accuracy. This type of illumination is especially recommended for high accuracy measurement of round or cylindrical parts where diffusive back lighting would offer poor performances because of the diffuse reflections coming from the edges of objects under inspection.

KEY ADVANTAGES

Complete light coupling
All the light emitted by a LTCLHP source is collected by a telecentric lens and transferred to the camera detector, ensuring very high signal-to-noise ratios.
Border effects removal
Diffused back-illuminators often make objects seem smaller than their actual size because of light reflections on the object sides, while collimated rays are typically much less reflected.
Field depth and telecentricity improvement
Collimated illumination geometry increases a telecentric lens natural field depth and telecentricity far beyond its nominal specs.
Homogeneity test report with measured values

NEW

LTCLHP series is now also available with new LTSCHP1W-GZ green light source, suitable for any kind of sample and specifically tailored for measuring reflective objects and objects with sharp edges.

KEY FEATURES

Reduction of edge diffraction effects
Enhanced illumination uniformity, especially on large FOVs
Less sensitive to alignment

TELECENTRIC LIGHTS

	Optical specs			Mechanical specifications		Electrical specifications							Compatibility
						Device power ratings				LED power ratings
Part number	Light color, wavelength peak	Beam diam.	Working distance range	Length	Outer diam.	DC voltage		Power cons.	Max LED fwd current	Forward voltage		Max pulse current
						min	max			typ.	max
(*)		(mm)	(mm)	(mm)	(mm)	(V)	(V)	(W)	(mA)	(V)	(V)	(mA)
				1					2	3		4
LTCLHP023-RTelecentric HP illuminator, beam diameter 16 mm, red	red, 630 nm	16	45 - 90	96.8	28	12	24	< 2.5	350	2.4	3.00	2000	TC2300y, TC23012, TC4M00y-x,	Buy now
LTCLHP023-GTelecentric HP illuminator, beam diameter 16 mm, green	green, 520 nm	16	45 - 90	96.8	28	12	24	< 2.5	350	3.3	4.00	2000	TC2300y, TC23012, TC4M00y-x,	Buy now
LTCLHP023-BTelecentric HP illuminator, beam diameter 16 mm, blue	blue, 460 nm	16	45 - 90	96.8	28	12	24	< 2.5	350	3.3	4.00	2000	TC2300y, TC23012, TC4M00y-x,	Buy now
LTCLHP023-WTelecentric HP illuminator, beam diameter 16 mm, white	white	16	45 - 90	96.8	28	12	24	< 2.5	350	2.78	-	2000	TC2300y, TC23012, TC4M00y-x,	Buy now
LTCLHP016-RTelecentric HP illuminator, beam diameter 20 mm, red	red, 630 nm	20	35 - 70	99.9	38	12	24	< 2.5	350	2.4	3.00	2000	TCxx016, TC4MHR016-x, TC2MHR016-x, TCLWD series	Buy now
LTCLHP016-GTelecentric HP illuminator, beam diameter 20 mm, green	green, 520 nm	20	35 - 70	99.9	38	12	24	< 2.5	350	3.3	4.00	2000	TCxx016, TC4MHR016-x, TC2MHR016-x, TCLWD series	Buy now
LTCLHP016-BTelecentric HP illuminator, beam diameter 20 mm, blue	blue, 460 nm	20	35 - 70	99.9	38	12	24	< 2.5	350	3.3	4.00	2000	TCxx016, TC4MHR016-x, TC2MHR016-x, TCLWD series	Buy now
LTCLHP016-WTelecentric HP illuminator, beam diameter 20 mm, white	white	20	35 - 70	99.9	38	12	24	< 2.5	350	2.78	-	2000	TCxx016, TC4MHR016-x, TC2MHR016-x, TCLWD series	Buy now
LTCLHP024-RTelecentric HP illuminator, beam diameter 30 mm, red	red, 630 nm	30	45 - 90	124.7	44	12	24	< 2.5	350	2.4	3.00	2000	TCxx024, TCxMHR024-x, TC16M009-x, TC16M012-x, TC16M018-x	Buy now
LTCLHP024-GTelecentric HP illuminator, beam diameter 30 mm, green	green, 520 nm	30	45 - 90	124.7	44	12	24	< 2.5	350	3.3	4.00	2000	TCxx024, TCxMHR024-x, TC16M009-x, TC16M012-x, TC16M018-x	Buy now
LTCLHP024-BTelecentric HP illuminator, beam diameter 30 mm, blue	blue, 460 nm	30	45 - 90	124.7	44	12	24	< 2.5	350	3.3	4.00	2000	TCxx024, TCxMHR024-x, TC16M009-x, TC16M012-x, TC16M018-x	Buy now
LTCLHP024-WTelecentric HP illuminator, beam diameter 30 mm, white	white	30	45 - 90	124.7	44	12	24	< 2.5	350	2.78	-	2000	TCxx024, TCxMHR024-x, TC16M009-x, TC16M012-x, TC16M018-x	Buy now
LTCLHP036-RTelecentric HP illuminator, beam diameter 45 mm, red	red, 630 nm	45	70 - 140	152.1	61	12	24	< 2.5	350	2.4	3.00	2000	TCxx036, TCxMHR036-x, TC16M036-x	Buy now
LTCLHP036-GTelecentric HP illuminator, beam diameter 45 mm, green	green, 520 nm	45	70 - 140	152.1	61	12	24	< 2.5	350	3.3	4.00	2000	TCxx036, TCxMHR036-x, TC16M036-x	Buy now
LTCLHP036-BTelecentric HP illuminator, beam diameter 45 mm, blue	blue, 460 nm	45	70 - 140	152.1	61	12	24	< 2.5	350	3.3	4.00	2000	TCxx036, TCxMHR036-x, TC16M036-x	Buy now
LTCLHP036-WTelecentric HP illuminator, beam diameter 45 mm, white	white	45	70 - 140	152.1	61	12	24	< 2.5	350	2.78	-	2000	TCxx036, TCxMHR036-x, TC16M036-x	Buy now
LTCLHP048-RTelecentric HP illuminator, beam diameter 60 mm, red	red, 630 nm	60	90 - 180	187.2	75	12	24	< 2.5	350	2.4	3.00	2000	TCxx048, TCCRxx048, TCxMHR048-x, TC16M048-x	Buy now
LTCLHP048-GTelecentric HP illuminator, beam diameter 60 mm, green	green, 520 nm	60	90 - 180	187.2	75	12	24	< 2.5	350	3.3	4.00	2000	TCxx048, TCCRxx048, TCxMHR048-x, TC16M048-x	Buy now
LTCLHP048-BTelecentric HP illuminator, beam diameter 60 mm, blue	blue, 460 nm	60	90 - 180	187.2	75	12	24	< 2.5	350	3.3	4.00	2000	TCxx048, TCCRxx048, TCxMHR048-x, TC16M048-x	Buy now
LTCLHP048-WTelecentric HP illuminator, beam diameter 60 mm, white	white	60	90 - 180	187.2	75	12	24	< 2.5	350	2.78	-	2000	TCxx048, TCCRxx048, TCxMHR048-x, TC16M048-x	Buy now
LTCLHP056-RTelecentric HP illuminator, beam diameter 70 mm, red	red, 630 nm	70	100 - 200	210.5	80	12	24	< 2.5	350	2.4	3.00	2000	TCxx056, TCCRxx056, TCxMHR056-x, TC16M056-x	Buy now
LTCLHP056-GTelecentric HP illuminator, beam diameter 70 mm, green	green, 520 nm	70	100 - 200	210.5	80	12	24	< 2.5	350	3.3	4.00	2000	TCxx056, TCCRxx056, TCxMHR056-x, TC16M056-x	Buy now
LTCLHP056-BTelecentric HP illuminator, beam diameter 70 mm, blue	blue, 460 nm	70	100 - 200	210.5	80	12	24	< 2.5	350	3.3	4.00	2000	TCxx056, TCCRxx056, TCxMHR056-x, TC16M056-x	Buy now
LTCLHP056-WTelecentric HP illuminator, beam diameter 70 mm, white	white	70	100 - 200	210.5	80	12	24	< 2.5	350	2.78	-	2000	TCxx056, TCCRxx056, TCxMHR056-x, TC16M056-x	Buy now
LTCLHP064-RTelecentric HP illuminator, beam diameter 80 mm, red	red, 630 nm	80	120 - 240	231.6	100	12	24	< 2.5	350	2.4	3.00	2000	TCxx064, TCCRxx064, TCxMHR064-x, TC16M064-x, TC12K064	Buy now
LTCLHP064-GTelecentric HP illuminator, beam diameter 80 mm, green	green, 520 nm	80	120 - 240	231.6	100	12	24	< 2.5	350	3.3	4.00	2000	TCxx064, TCCRxx064, TCxMHR064-x, TC16M064-x, TC12K064	Buy now
LTCLHP064-BTelecentric HP illuminator, beam diameter 80 mm, blue	blue, 460 nm	80	120 - 240	231.6	100	12	24	< 2.5	350	3.3	4.00	2000	TCxx064, TCCRxx064, TCxMHR064-x, TC16M064-x, TC12K064	Buy now
LTCLHP064-WTelecentric HP illuminator, beam diameter 80 mm, white	white	80	120 - 240	231.6	100	12	24	< 2.5	350	2.78	-	2000	TCxx064, TCCRxx064, TCxMHR064-x, TC16M064-x, TC12K064	Buy now
LTCLHP080-RTelecentric HP illuminator, beam diameter 100 mm, red	red, 630 nm	100	150 - 300	277.2	116	12	24	< 2.5	350	2.4	3.00	2000	TC23072, TCxx080, TCCRxx080, TCxMHR080-x, TC16M080-x, TC12K080	Buy now
LTCLHP080-GTelecentric HP illuminator, beam diameter 100 mm, green	green, 520 nm	100	150 - 300	277.2	116	12	24	< 2.5	350	3.3	4.00	2000	TC23072, TCxx080, TCCRxx080, TCxMHR080-x, TC16M080-x, TC12K080	Buy now
LTCLHP080-BTelecentric HP illuminator, beam diameter 100 mm, blue	blue, 460 nm	100	150 - 300	277.2	116	12	24	< 2.5	350	3.3	4.00	2000	TC23072, TCxx080, TCCRxx080, TCxMHR080-x, TC16M080-x, TC12K080	Buy now
LTCLHP080-WTelecentric HP illuminator, beam diameter 100 mm, white	white	100	150 - 300	277.2	116	12	24	< 2.5	350	2.78	-	2000	TC23072, TCxx080, TCCRxx080, TCxMHR080-x, TC16M080-x, TC12K080	Buy now
LTCLHP096-GTelecentric HP illuminator, beam diameter 120 mm, green	green, 520 nm	120	200 - 350	322.2	143	12	24	< 2.5	350	3.3	4.00	2000	TC23085, TCxx096, TCCRxx096, TCxMHR096-x, TC16M096-x	Buy now
LTCLHP096-RTelecentric HP illuminator, beam diameter 120 mm, red	red, 630 nm	120	200 - 350	322.2	143	12	24	< 2.5	350	2.4	3.00	2000	TC23085, TCxx096, TCCRxx096, TCxMHR096-x, TC16M096-x	Buy now
LTCLHP096-BTelecentric HP illuminator, beam diameter 120 mm, blue	blue, 460 nm	120	200 - 350	322.2	143	12	24	< 2.5	350	3.3	4.00	2000	TC23085, TCxx096, TCCRxx096, TCxMHR096-x, TC16M096-x	Buy now
LTCLHP096-WTelecentric HP illuminator, beam diameter 120 mm, white	white	120	200 - 350	322.2	143	12	24	< 2.5	350	2.78	-	2000	TC23085, TCxx096, TCCRxx096, TCxMHR096-x, TC16M096-x	Buy now
LTCLHP120-RTelecentric HP illuminator, beam diameter 150 mm, red	red, 630 nm	150	220 - 440	408.2	180	12	24	< 2.5	350	2.4	3.00	2000	TC23110, TCxx120, TCxMHR120-x, TC16M120-x, TC12K120	Buy now
LTCLHP120-GTelecentric HP illuminator, beam diameter 150 mm, green	green, 520 nm	150	220 - 440	408.2	180	12	24	< 2.5	350	3.3	4.00	2000	TC23110, TCxx120, TCxMHR120-x, TC16M120-x, TC12K120	Buy now
LTCLHP120-WTelecentric HP illuminator, beam diameter 150 mm, white	white	150	220 - 440	408.2	180	12	24	< 2.5	350	2.78	-	2000	TC23110, TCxx120, TCxMHR120-x, TC16M120-x, TC12K120	Buy now
LTCLHP144-RTelecentric HP illuminator, beam diameter 180 mm, red	red, 630 nm	180	270 - 540	467.2	200	12	24	< 2.5	350	2.4	3.00	2000	TC23130, TCxx144, TCxMHR144-x, TC16M144-x, TC12K144	Buy now
LTCLHP144-GTelecentric HP illuminator, beam diameter 180 mm, green	green, 520 nm	180	270 - 540	467.2	200	12	24	< 2.5	350	3.3	4.00	2000	TC23130, TCxx144, TCxMHR144-x, TC16M144-x, TC12K144	Buy now
LTCLHP192-RTelecentric HP illuminator, beam diameter 250 mm, red	red, 630 nm	250	350 - 700	608.2	260	12	24	< 2.5	350	2.4	3.00	2000	TC23172, TCxx192, TCxMHR192-x, TC12K192	Buy now
LTCLHP192-GTelecentric HP illuminator, beam diameter 250 mm, green	green, 520 nm	250	350 - 700	608.2	260	12	24	< 2.5	350	3.3	4.00	2000	TC23172, TCxx192, TCxMHR192-x, TC12K192	Buy now
LTCLHP192-WTelecentric HP illuminator, beam diameter 250 mm, white	white	250	350 - 700	608.2	260	12	24	< 2.5	350	2.78	-	2000	TC23172, TCxx192, TCxMHR192-x, TC12K192	Buy now
LTCLHP240-RTelecentric HP illuminator, beam diameter 300 mm, red	red, 630 nm	300	350 - 700	769.2	322	12	24	< 2.5	350	2.4	3.00	2000	TC23200, TC23240, TCxMHR240-x	Buy now
LTCLHP240-GTelecentric HP illuminator, beam diameter 300 mm, green	green, 520 nm	300	350 - 700	769.2	322	12	24	< 2.5	350	3.3	4.00	2000	TC23200, TC23240, TCxMHR240-x	Buy now

Notes

Opto Engineering® recommends green light for high precision measurement applications.
Nominal value, with no spacers in place.

Technical documents

Data table

XLS

LTCLHP manual v2

Product user guide

Press & marketing content

Inspection, measurement and illumination solutions for the automotive industry

Optical solutions for the pharmaceutical/biomedical industry

LTCLHP product presentation

Compatible products

CMHO series

Clamping mechanics

TC series

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

TC2MHR and TC4MHR series

High resolution telecentric lenses for large detectors up to 1.2″

TC16M series

Telecentric lenses for Full Frame and 8 k pixel line detectors

TC12K series

Telecentric lenses for 12k and 16kpx linescan cameras

LTSCHP series

High-performance replacement LED modules

CB244P1500

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

TCBENCH series

Telecentric optical benches for easy measurements

LTDV1CH-17V

Strobe controller 1 channel variable current 5 mA - 17A

Tools and resources

Telecentric lenses tutorial

Frequently asked questions

Instructions for use

Operation options

LTSCHP LED modules can be operated in two ways:

standard usage option: through the built-in electronics
direct LED control usage option

STANDARD usage option (LED control throuh built-in electronics)

Only conitinuous mode (constant voltage) is allowed.

Connection:

Connect the black and the brown cables to your +12 / +24 V power supply.

Light intensity adjustment

The built-in multi-turn trimmer allows to control the light (LED forward current) intensity with a very high degree of precision: you can bring the current intensity from minimum to maximum with 21 full turns of the adjustment screw. Simply remove the protective cap and rotate counter-clockwise the adjustment screw to increase light intensity and vice versa.

		Device power ratings				LED power ratings
Part number	Light color, Wavelength peak	DC voltage 1		Power consumption	Max LED forward current	Forward voltage		Max pulse current	Compatibility
		Minimum	Maximum			Typical	Maximum
		(V)	(V)	(W)	(mA)	(V)	(V)	(mA)
					2	3	4	5	7
LTSCHP1W-RReplacement LED module, red	red, 630 nm	12	24	< 2.5	350	2.4	3.00	2000	LTCLHP, TCBENCH, LTCL4K, TCCX, TCCXQ , LTCLHP CORE, TCBENCH CORE, TCKIT, MZMT12X
LTSCHP1W-GReplacement LED module, green	green, 520 nm	12	24	< 2.5	350	3.3	4.00	2000	LTCLHP, TCBENCH, LTCL4K, TCCX, TCCXQ , LTCLHP CORE, TCBENCH CORE, TCKIT, MZMT12X
LTSCHP1W-BReplacement LED module, blue	blue, 460 nm	12	24	< 2.5	350	3.3	4.00	2000	LTCLHP, TCBENCH, LTCL4K, TCCX, TCCXQ , LTCLHP CORE, TCBENCH CORE, TCKIT, MZMT12X
LTSCHP1W-WReplacement LED module, white	white	12	24	< 2.5	350	2.78	-	2000	LTCLHP, TCBENCH, LTCL4K, TCCX, TCCXQ , LTCLHP CORE, TCBENCH CORE, TCKIT, MZMT12X

Tolerance ± 10%
Used in continuous (not pulsed) mode.
At max forward current.
Tolerance is ±0.06V on forward voltage measurements.
At pulse width <= 10 ms, duty cycle <= 10% condition. Built-in electronics board must be bypassed (see tech info).
Shipped not assembled. See LTCLHP instruction manual.
Some part numbers are not available in all color options (-R, -G, -B and -W). See page of each product series for available colors.

Direct LED control usage option

Both continuous and pulsed mode are allowed; the built-in electronics can be bypassed in order to drive the LED directly for use in continuous or pulsed mode. When bypassed, builtin electronics behaves as an open circuit allowing direct control of the LED source. Please note that in such case light intensity adjustment is not possible though the built-in multi-turn trimmer.

Connection:

Connect the black and blue cables as shown below (remove the LED anode protective cover).

Make sure not to exceed
LEDs maximum rates to avoid
electrical shorts.

Illumination stability

In machine vision systems it is essential that flicker-free light appears to the camera in order to provide consistent and repeatable image output. LTCLHP collimated illuminators feature no light flickering thanks to very high current stability over time even at low currents ¹ providing images with stable gray-levels background ². This is achieved through sophisticated built-in electronics which ensures constant current flow through the LED source and simultaneously lowers the noise level to the minimum. The state of the art built-in electronics is the core of Opto Engineering collimated illuminators built to provide excellent illumination stability, uniform light and low warm-up time (see graphs below).

Easy LED replacement

All LEDs offered by Opto Engineering can be easily replaced and positioned by the user using the provided LED centering tool which guarantees precise LED alignment. This way there is no need for soldering and no need to realign the imaging lens with LTCLHP collimated illuminator.

Wide selection of different colors

Available LED colors include:

R = red, peak at 630 nm
G = green, peak at 520 nm
B = blue, peak at 460 nm
W = white

Opto Engineering recommends green light for high precision measurement applications: ensuring the lowest distortion and the highest telecentricity, also delivering the highest signal/noise ratio and the best image resolution.

Selecting the color of LTCLHP illuminators is easy: when ordering for example LTCLHP 064-G defines a LTCLHP 064 type collimated illuminator equipped with green (-G) LED.

Easy and precise alignment with bi-telecentric lenses

Create the perfect optical bench for any precision measurement application by interfacing our bi-telecentric lenses and LTCLHP collimated illuminators using Opto Engineering precision clamping mechanics CMHO series.

Each LTCLHP collimated illuminator up to LTCLHP 144-X can be mounted on the same clamping mechanics (CMHO series) used to fix and align our telecentric lenses.

Excellent thermal management

Stable illumination can only be achieved when heat dissipation is correctly managed. LTCLHP collimated illuminators provide stable illumination because they efficiently dissipate the heat generated by the built-in electronics and the LED source thanks to a suitable heat sink directly in contact with the inner circuitry. This way, a low LED junction temperature in maintained ensuring optimal optical output performances (see graphs below)

Warm-up times

Typical warm-up times at minimum and maximum LED forward current.

Normalized Illuminance graphs indicate typical warm-up times for green, blue, red and white light sources.

About LED source axial position

LED axial position is an important operational parameter that must be correctly set to obtain optimal illumination homogeneity. LED axial position is adjusted at factory by placing/removing internal or external spacers of various thicknesses.

Each LTCLHPxxx illuminator is configured by default with the number and type of spacers needed to achieve the best illumination homogeneity with its corresponding TC23xxx telecentric lens model. The number and type of spacers needed to achieve the optimal light homogeneity can be different when LTCLHPxxx is used in combination with TC13xxx, TC12xxx or telecentric lenses designed for other sensor sizes.

Notes

Less than 1‰ variation in LED forward current intensity.
Variation of mean gray level between 10 consecutive images
21 full turns are required to bring the light intensity from minimum to maximum.
Make sure that the maximum rates are not exceeded to avoid electrical shorts.

Company & Resources