LTCLHP series

Telecentric HP illuminators

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 a 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.
CE   CE   CE  

New features

  • Improved illumination stability
  • Precise light intensity tuning
  • Easy LED source replacement

Discover all the advantages in detail
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Optical specs Mechanical specifications Electrical specifications Compatibility Datasheet
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Device power ratings LED power ratings
Part number Beam
diam.		 Light color, wavelength
peak		 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-R 16 red, 630 nm 45 ~ 90 96.8 28 12 24 <2.5 350 2.4 3.00 2000 TC2300x, TC23012, TC4M004, TC4M007, TC4M009
LTCLHP023-G 16 green, 520 nm 45 ~ 90 96.8 28 12 24 <2.5 350 3.3 4.00 2000 TC2300x, TC23012, TC4M004, TC4M007, TC4M009
LTCLHP023-B 16 blue, 460 nm 45 ~ 90 96.8 28 12 24 <2.5 350 3.3 4.00 2000 TC2300x, TC23012, TC4M004, TC4M007, TC4M009
LTCLHP023-W 16 white 45 ~ 90 96.8 28 12 24 <2.5 350 2.78 n.a. 2000 TC2300x, TC23012, TC4M004, TC4M007, TC4M009
LTCLHP016-R 20 red, 630 nm 35 ~ 70 99.9 38 12 24 <2.5 350 2.4 3.00 2000 TC12016, TC23016, TC4M016-X, TC2M016-X
LTCLHP016-G 20 green, 520 nm 35 ~ 70 99.9 38 12 24 <2.5 350 3.3 4.00 2000 TC12016, TC23016, TC4M016-X, TC2M016-X
LTCLHP016-B 20 blue, 460 nm 35 ~ 70 99.9 38 12 24 <2.5 350 3.3 4.00 2000 TC12016, TC23016, TC4M016-X, TC2M016-X
LTCLHP016-W 20 white 35 ~ 70 99.9 38 12 24 <2.5 350 2.78 n.a. 2000 TC12016, TC23016, TC4M016-X, TC2M016-X
LTCLHP024-R 30 red, 630 nm 45 ~ 90 124.7 44 12 24 <2.5 350 2.4 3.00 2000 TC12024, TC23024, TC4M024-X, TC2M024-X, TC16M009, TC16M012, TC16M018
LTCLHP024-G 30 green, 520 nm 45 ~ 90 124.7 44 12 24 <2.5 350 3.3 4.00 2000 TC12024, TC23024, TC4M024-X, TC2M024-X, TC16M009, TC16M012, TC16M018
LTCLHP024-B 30 blue, 460 nm 45 ~ 90 124.7 44 12 24 <2.5 350 3.3 4.00 2000 TC12024, TC23024, TC4M024-X, TC2M024-X, TC16M009, TC16M012, TC16M018
LTCLHP024-W 30 white 45 ~ 90 124.7 44 12 24 <2.5 350 2.78 n.a. 2000 TC12024, TC23024, TC4M024-X, TC2M024-X, TC16M009, TC16M012, TC16M018
LTCLHP036-R 45 red, 630 nm 70 ~ 140 152.1 61 12 24 <2.5 350 2.4 3.00 2000 TC13036, TC12036, TC23036, TC13036, TC2M036, TC4M036, TC16M036
LTCLHP036-G 45 green, 520 nm 70 ~ 140 152.1 61 12 24 <2.5 350 3.3 4.00 2000 TC13036, TC12036, TC23036, TC13036, TC2M036, TC4M036, TC16M036
LTCLHP036-B 45 blue, 460 nm 70 ~ 140 152.1 61 12 24 <2.5 350 3.3 4.00 2000 TC13036, TC12036, TC23036, TC13036, TC2M036, TC4M036, TC16M036
LTCLHP036-W 45 white 70 ~ 140 152.1 61 12 24 <2.5 350 2.78 n.a. 2000 TC13036, TC12036, TC23036, TC13036, TC2M036, TC4M036, TC16M036
LTCLHP048-R 60 red, 630 nm 90 ~ 180 187.2 75 12 24 <2.5 350 2.4 3.00 2000 TC13048, TC12048, TC23048, TC13048, TC2M048, TC4M048, TC16M048
LTCLHP048-B 60 blue, 460 nm 90 ~ 180 187.2 75 12 24 <2.5 350 3.3 4.00 2000 TC13048, TC12048, TC23048, TC13048, TC2M048, TC4M048, TC16M048
LTCLHP048-G 60 green, 520 nm 90 ~ 180 187.2 75 12 24 <2.5 350 3.3 4.00 2000 TC13048, TC12048, TC23048, TC13048, TC2M048, TC4M048, TC16M048
LTCLHP048-W 60 white 90 ~ 180 187.2 75 12 24 <2.5 350 2.78 n.a. 2000 TC13048, TC12048, TC23048, TC13048, TC2M048, TC4M048, TC16M048
LTCLHP056-R 70 red, 630 nm 100 ~ 200 210.5 80 12 24 <2.5 350 2.4 3.00 2000 TC12056, TC23056, TC13056, TC2M056, TC4M056, TC16M056
LTCLHP056-G 70 green, 520 nm 100 ~ 200 210.5 80 12 24 <2.5 350 3.3 4.00 2000 TC12056, TC23056, TC13056, TC2M056, TC4M056, TC16M056
LTCLHP056-B 70 blue, 460 nm 100 ~ 200 210.5 80 12 24 <2.5 350 3.3 4.00 2000 TC12056, TC23056, TC13056, TC2M056, TC4M056, TC16M056
LTCLHP056-W 70 white 100 ~ 200 210.5 80 12 24 <2.5 350 2.78 n.a. 2000 TC12056, TC23056, TC13056, TC2M056, TC4M056, TC16M056
LTCLHP064-R 80 red, 630 nm 120 ~ 240 231.6 100 12 24 <2.5 350 2.4 3.00 2000 TC13064, TC12064, TC23064, TC13064, TC2M064, TC4M064, TC16M064, TC12K064
LTCLHP064-G 80 green, 520 nm 120 ~ 240 231.6 100 12 24 <2.5 350 3.3 4.00 2000 TC13064, TC12064, TC23064, TC13064, TC2M064, TC4M064, TC16M064, TC12K064
LTCLHP064-B 80 blue, 460 nm 120 ~ 240 231.6 100 12 24 <2.5 350 3.3 4.00 2000 TC13064, TC12064, TC23064, TC13064, TC2M064, TC4M064, TC16M064, TC12K064
LTCLHP064-W 80 white 120 ~ 240 231.6 100 12 24 <2.5 350 2.78 n.a. 2000 TC13064, TC12064, TC23064, TC13064, TC2M064, TC4M064, TC16M064, TC12K064
LTCLHP080-R 100 red, 630 nm 150 ~ 300 277.2 116 12 24 <2.5 350 2.4 3.00 2000 TC13080, TC12072, TC12080, TC4M072, TC4M080, TC2M080, TC16M080, TC12K080
LTCLHP080-G 100 green, 520 nm 150 ~ 300 277.2 116 12 24 <2.5 350 3.3 4.00 2000 TC13080, TC12072, TC12080, TC4M072, TC4M080, TC2M080, TC16M080, TC12K080
LTCLHP080-B 100 blue, 460 nm 150 ~ 300 277.2 116 12 24 <2.5 350 3.3 4.00 2000 TC13080, TC12072, TC12080, TC4M072, TC4M080, TC2M080, TC16M080, TC12K080
LTCLHP080-W 100 white 150 ~ 300 277.2 116 12 24 <2.5 350 2.78 n.a. 2000 TC13080, TC12072, TC12080, TC4M072, TC4M080, TC2M080, TC16M080, TC12K080
LTCLHP096-G 120 green, 520 nm 200 ~ 250 322.2 143 12 24 <2.5 350 3.3 4.00 2000 TC13096, TC12085, TC12096, TC4M085, TC4M096, TC2M096, TC16M096
LTCLHP096-R 120 red, 630 nm 200 ~ 250 322.2 143 12 24 <2.5 350 2.4 3.00 2000 TC13096, TC12085, TC12096, TC4M085, TC4M096, TC2M096, TC16M096
LTCLHP096-B 120 blue, 460 nm 200 ~ 250 322.2 143 12 24 <2.5 350 3.3 4.00 2000 TC13096, TC12085, TC12096, TC4M085, TC4M096, TC2M096, TC16M096
LTCLHP096-W 120 white 200 ~ 250 322.2 143 12 24 <2.5 350 2.78 n.a. 2000 TC13096, TC12085, TC12096, TC4M085, TC4M096, TC2M096, TC16M096
LTCLHP120-R 150 red, 630 nm 220 ~ 440 408.2 180 12 24 <2.5 350 2.4 3.00 2000 TC13120, TC23110, TC23120, TC4M110, TC4M120, TC2M120, TC16M120, TC12K120
LTCLHP120-G 150 green, 520 nm 220 ~ 440 408.2 180 12 24 <2.5 350 3.3 4.00 2000 TC13120, TC23110, TC23120, TC4M110, TC4M120, TC2M120, TC16M120, TC12K120
LTCLHP120-W 150 white 220 ~ 440 408.2 180 12 24 <2.5 350 2.78 n.a. 2000 TC13120, TC23110, TC23120, TC4M110, TC4M120, TC2M120, TC16M120, TC12K120
LTCLHP144-R 180 red, 630 nm 270 ~ 540 467.2 200 12 24 <2.5 350 2.4 3.00 2000 TC12144, TC23130, TC23144, TC4M130, TC4M144, TC2M144, TC16M144, TC12K144
LTCLHP144-G 180 green, 520 nm 270 ~ 540 467.2 200 12 24 <2.5 350 3.3 4.00 2000 TC12144, TC23130, TC23144, TC4M130, TC4M144, TC2M144, TC16M144, TC12K144
LTCLHP192-R 250 red, 630 nm 350 ~ 700 608.2 260 12 24 <2.5 350 2.4 3.00 2000 TC12192, TC23172, TC23192, TC4M172, TC4M192, TC2M192, TC12K192
LTCLHP192-G 250 green, 520 nm 350 ~ 700 608.2 260 12 24 <2.5 350 3.3 4.00 2000 TC12192, TC23172, TC23192, TC4M172, TC4M192, TC2M192, TC12K192
LTCLHP192-W 250 white 350 ~ 700 608.2 260 12 24 <2.5 350 2.78 n.a. 2000 TC12192, TC23172, TC23192, TC4M172, TC4M192, TC2M192, TC12K192
LTCLHP240-R 300 red, 630 nm 350 ~ 700 769.2 322 12 24 <2.5 350 2.4 3.00 2000 TC23200, TC23240, TC4M200, TC4M240
LTCLHP240-G 300 green, 520 nm 350 ~ 700 769.2 322 12 24 <2.5 350 3.3 4.00 2000 TC23200, TC23240, TC4M200, TC4M240

Notes

  1. Nominal value, with no spacers in place.
  2. Used in continuous (not pulsed) mode.
  3. At max forward current. Tolerance is ±0.06V on forward voltage measurements.
  4. At pulse width ≥ 10 ms, duty cycle ≤ 10% condition. Built-in electronics board must be bypassed (see tech info).
LTCLHP023-R
LTCLHP023-G
LTCLHP023-B
LTCLHP023-W
LTCLHP016-R
LTCLHP016-G
LTCLHP016-B
LTCLHP016-W
LTCLHP024-R
LTCLHP024-G
LTCLHP024-B
LTCLHP024-W
LTCLHP036-R
LTCLHP036-G
LTCLHP036-B
LTCLHP036-W
LTCLHP048-R
LTCLHP048-B
LTCLHP048-G
LTCLHP048-W
LTCLHP056-R
LTCLHP056-G
LTCLHP056-B
LTCLHP056-W
LTCLHP064-R
LTCLHP064-G
LTCLHP064-B
LTCLHP064-W
LTCLHP080-R
LTCLHP080-G
LTCLHP080-B
LTCLHP080-W
LTCLHP096-G
LTCLHP096-R
LTCLHP096-B
LTCLHP096-W
LTCLHP120-R
LTCLHP120-G
LTCLHP120-W
LTCLHP144-R
LTCLHP144-G
LTCLHP192-R
LTCLHP192-G
LTCLHP192-W
LTCLHP240-R
LTCLHP240-G

Videos

 

OTHER VIDEOS

Find more videos on our Vimeo channel

Product images

Find more pages on our Flickr page

Technical documents

Product user guide PDF
LTCLHP manual PDF

Press & marketing content

LTCLHP product presentation PDF
Telecentric lenses brochure PDF

Layout files

LTCLHP023-R
LTCLHP023-G
LTCLHP023-B
LTCLHP023-W
LTCLHP016-R
LTCLHP016-G
LTCLHP016-B
LTCLHP016-W
LTCLHP024-R
LTCLHP024-G
LTCLHP024-B
LTCLHP024-W
LTCLHP036-R
LTCLHP036-G
LTCLHP036-B
LTCLHP036-W
LTCLHP048-R
LTCLHP048-B
LTCLHP048-G
LTCLHP048-W
LTCLHP056-R
LTCLHP056-G
LTCLHP056-B
LTCLHP056-W
LTCLHP064-R
LTCLHP064-G
LTCLHP064-B
LTCLHP064-W
LTCLHP080-R
LTCLHP080-G
LTCLHP080-B
LTCLHP080-W
LTCLHP096-G
LTCLHP096-R
LTCLHP096-B
LTCLHP096-W
LTCLHP120-R
LTCLHP120-G
LTCLHP120-W
LTCLHP144-R
LTCLHP144-G
LTCLHP192-R
LTCLHP192-G
LTCLHP192-W
LTCLHP240-R
LTCLHP240-G

Please contact us if you have questions or need more information.

Compatible products

CMHO series

Clamping mechanics

TC series

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

TC2M and TC4M series

Bi-telecentric lenses for large detectors

TC16M series

Bi-telecentric lenses for very large detectors

TC12K series

Telecentric lenses for 12k and 16kpx line scan cameras

CB244P1500

Power cable for LTSCHP1W LED modules

See also

TCBENCH series
LTCL series

Tools and resources

Telecentric lenses tutorial
TC options
TC accuracy chart
Image gallery
Video gallery
Frequently asked questions

Electrical specifications

Device power ratings LED power ratings
Part number Light color, wavelength peak DC voltage Power consumption Max LED fwd current Forward voltage Max pulse current
min max typ. max
(V) (V) (W) (mA) (V) (V) (mA)
1 2 3
LTCLHPxxx-R red, 630 nm 12 24 < 2.5 350 2.4 3.00 2000
LTCLHPxxx-G green, 520 nm 12 24 < 2.5 350 3.3 4.00 2000
LTCLHPxxx-B blue, 460 nm 12 24 < 2.5 350 3.3 4.00 2000
LTCLHPxxx-W white 12 24 < 2.5 350 2.78 n.a. 2000
  1. Used in continuous (not pulsed) mode.
  2. At max forward current. Tolerance is ±0.06V on forward voltage measurements.
  3. At pulse width ≤ 10 ms, duty cycle ≤ 10% condition. Built-in electronics board must be bypassed (see tech info).

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).

 

Stability

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.

 

Easy replacement

Precise light intensity tuning

Easily and precisely tune the light intensity level thanks to the leadscrew multi-turn trimmer positioned in the back 3

tuning

Direct LED control

The built-in electronics can be bypassed in order to drive the LED directly for use in continuous or pulsed mode. When bypassed, built-in electronics behaves as an open circuit allowing direct control of the LED source 4.

Pins

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.

 

Emission spectrum of white LEDs

 

Emission spectrum of RGB LEDs

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.

 

Light paths with LTCL alignment

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)

Thermal management

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.

a
b
c
w

Notes

  1. Less than 1‰ variation in LED forward current intensity.
  2. Variation of mean gray level between 10 consecutive images
  3. 21 full turns are required to bring the light intensity from minimum to maximum.
  4. Make sure that the maximum rates are not exceeded to avoid electrical shorts.