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  • Home
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  • Telecentric lenses
  • LTCL series

LTCL series

Collimated (telecentric) LED illuminators

Catalog 2019

LTCL series is discontinued and replaced by LTCLHP series: date for last order acceptance is October 15, 2014.

Download notice document

Overview
Models
Downloads
Related
Tech info
Media gallery

LTCL collimated illuminators have been specifically designed to back illuminate objects imaged by telecentric lenses.

This type of illumination is strongly recommended for high accuracy measurement of round or cylindrical parts where diffusive back lighting would offer poor performances.

KEY ADVANTAGES

  • Complete light coupling
    All the light emitted by a LTCL 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.

Sample applications

Coils and springs Coils and springs Tubes and shafts Tubes and shafts
Screws and nuts Screws and nuts Seals and o-rings Seals and o-rings

 

LTCL series is replaced by new LTCLHP series. New series provides improved illumination stability, more precise light intensity tuning and easy LED source replacement. Contact our sales engineers to discuss about your specific needs.

LTCL telecentric illuminator, green light
Optical specs Mechanical specifications Compatible telecentric lenses
Part number Beam
diameter
Working
distance
range
Length Outer
diameter
TC13yyy
yyy=
TC12yyy
yyy=
TC23yyy
yyy=
TC4M yyy
yyy=
TC2M yyy
yyy=
TC16M yyy
yyy=
TC12K yyy
yyy=
(*) (mm) (mm) (mm) (mm)
LTCL023-RTelecentric illuminator, beam diameter 16 mm, red 16 45 - 90 83.6 28 - - 00x, 012 004, 007, 009 - - - Info
LTCL023-GTelecentric illuminator, beam diameter 16 mm, green 16 45 - 90 83.6 28 - - 00x, 012 004, 007, 009 - - - Info
LTCL023-BTelecentric illuminator, beam diameter 16 mm, blue 16 45 - 90 83.6 28 - - 00x, 012 004, 007, 009 - - - Info
LTCL023-WTelecentric illuminator, beam diameter 16 mm, white 16 45 - 90 83.6 28 - - 00x, 012 004, 007, 009 - - - Info
LTCL016-RTelecentric illuminator, beam diameter 20 mm, red 20 35 - 70 86.7 38 - 016 016 016 016 - - Info
LTCL016-GTelecentric illuminator, beam diameter 20 mm, green 20 35 - 70 86.7 38 - 016 016 016 016 - - Info
LTCL016-BTelecentric illuminator, beam diameter 20 mm, blue 20 35 - 70 86.7 38 - 016 016 016 016 - - Info
LTCL016-WTelecentric illuminator, beam diameter 20 mm, white 20 35 - 70 86.7 38 - 016 016 016 016 - - Info
LTCL024-RTelecentric illuminator, beam diameter 30 mm, red 30 45 - 90 115.5 44 - 024 024 024 024 009, 012, 018 - Info
LTCL024-GTelecentric illuminator, beam diameter 30 mm, green 30 45 - 90 115.5 44 - 024 024 024 024 009, 012, 018 - Info
LTCL024-BTelecentric illuminator, beam diameter 30 mm, blue 30 45 - 90 115.5 44 - 024 024 024 024 009, 012, 018 - Info
LTCL024-WTelecentric illuminator, beam diameter 30 mm, white 30 45 - 90 115.5 44 - 024 024 024 024 009, 012, 018 - Info
LTCL036-RTelecentric illuminator, beam diameter 45 mm, red 45 70 - 140 138.9 61 036 036 036 036 036 036 - Info
LTCL036-GTelecentric illuminator, beam diameter 45 mm, green 45 70 - 140 138.9 61 036 036 036 036 036 036 - Info
LTCL036-BTelecentric illuminator, beam diameter 45 mm, blue 45 70 - 140 138.9 61 036 036 036 036 036 036 - Info
LTCL036-WTelecentric illuminator, beam diameter 45 mm, white 45 70 - 140 138.9 61 036 036 036 036 036 036 - Info
LTCL048-RTelecentric illuminator, beam diameter 60 mm, red 60 90 - 180 174.0 75 - 048 048 048 048 048 - Info
LTCL048-GTelecentric illuminator, beam diameter 60 mm, green 60 90 - 180 174.0 75 - 048 048 048 048 048 - Info
LTCL048-BTelecentric illuminator, beam diameter 60 mm, blue 60 90 - 180 174.0 75 - 048 048 048 048 048 - Info
LTCL048-WTelecentric illuminator, beam diameter 60 mm, white 60 90 - 180 174.0 75 - 048 048 048 048 048 - Info
LTCL056-RTelecentric illuminator, beam diameter 70 mm, red 70 100 - 200 197.3 80 - 056 056 056 056 056 - Info
LTCL056-GTelecentric illuminator, beam diameter 70 mm, green 70 100 - 200 197.3 80 - 056 056 056 056 056 - Info
LTCL056-BTelecentric illuminator, beam diameter 70 mm, blue 70 100 - 200 197.3 80 - 056 056 056 056 056 - Info
LTCL056-WTelecentric illuminator, beam diameter 70 mm, white 70 100 - 200 197.3 80 - 056 056 056 056 056 - Info
LTCL064-RTelecentric illuminator, beam diameter 80 mm, red 80 120 - 240 218.4 100 064 064 064 064 064 064 064 Info
LTCL064-GTelecentric illuminator, beam diameter 80 mm, green 80 120 - 240 218.4 100 064 064 064 064 064 064 064 Info
LTCL064-BTelecentric illuminator, beam diameter 80 mm, blue 80 120 - 240 218.4 100 064 064 064 064 064 064 064 Info
LTCL064-WTelecentric illuminator, beam diameter 80 mm, white 80 120 - 240 218.4 100 064 064 064 064 064 064 064 Info
LTCL080-RTelecentric illuminator, beam diameter 100 mm, red 100 150 - 300 264.0 116 - 080 072, 080 072, 080 080 080 080 Info
LTCL080-GTelecentric illuminator, beam diameter 100 mm, green 100 150 - 300 264.0 116 - 080 072, 080 072, 080 080 080 080 Info
LTCL080-BTelecentric illuminator, beam diameter 100 mm, blue 100 150 - 300 264.0 116 - 080 072, 080 072, 080 080 080 080 Info
LTCL080-WTelecentric illuminator, beam diameter 100 mm, white 100 150 - 300 264.0 116 - 080 072, 080 072, 080 080 080 080 Info
LTCL096-RTelecentric illuminator, beam diameter 120 mm, red 120 200 - 250 309,0 143 096 096 085, 096 085, 096 096 096 - Info
LTCL096-GTelecentric illuminator, beam diameter 120 mm, green 120 200 - 250 309,0 143 096 096 085, 096 085, 096 096 096 - Info
LTCL096-BTelecentric illuminator, beam diameter 120 mm, blue 120 200 - 250 309,0 143 096 096 085, 096 085, 096 096 096 - Info
LTCL096-WTelecentric illuminator, beam diameter 120 mm, white 120 200 - 250 309,0 143 096 096 085, 096 085, 096 096 096 - Info
LTCL120-RTelecentric illuminator, beam diameter 150 mm, red 150 220 - 440 395.0 180 - 120 110, 120 110, 120 120 120 120 Info
LTCL120-GTelecentric illuminator, beam diameter 150 mm, green 150 220 - 440 395.0 180 - 120 110, 120 110, 120 120 120 120 Info
LTCL120-WTelecentric illuminator, beam diameter 150 mm, white 150 220 - 440 395.0 180 - 120 110, 120 110, 120 120 120 120 Info
LTCL144-RTelecentric illuminator, beam diameter 180 mm, red 180 270 - 540 454.0 200 - 144 130, 144 130, 144 144 144 144 Info
LTCL144-GTelecentric illuminator, beam diameter 180 mm, green 180 270 - 540 454.0 200 - 144 130, 144 130, 144 144 144 144 Info
LTCL192-RTelecentric illuminator, beam diameter 250 mm, red 250 350 - 700 595.0 260 - 192 172, 192 172, 192 192 - 192 Info
LTCL192-GTelecentric illuminator, beam diameter 250 mm, green 250 350 - 700 595.0 260 - 192 172, 192 172, 192 192 - 192 Info
LTCL192-WTelecentric illuminator, beam diameter 250 mm, white 250 350 - 700 595.0 260 - 192 172, 192 172, 192 192 - 192 Info
LTCL240-RTelecentric illuminator, beam diameter 300 mm, red 300 350 - 700 756.0 322 - - 200, 240 200, 240 - - - Info
LTCL240-GTelecentric illuminator, beam diameter 300 mm, green 300 350 - 700 756.0 322 - - 200, 240 200, 240 - - - Info

Last update: 2015-02-04

Notes

* The last letter of the part number defines the source color:

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

Refer to the Tech info section for more info.

Technical documents

Data table (Last update: :2015-02-04)
XLS
Product user guide
Telecentric lenses tutorial
OE Bi-Telecentric technology
Back focal adjustment

Press & marketing content

Caps inspection and measurement
Telecentric applications
Bi-TC tech for accurate measurement

Compatible products

TC telecentric lens for matrix detectors

TC series

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

TC16M telecentric lens for very large detectors

TC16M series

Telecentric lenses for Full Frame and 8 k pixel line detectors

TC12K telecentric lens for linescan cameras

TC12K series

Telecentric lenses for 12k and 16kpx linescan cameras

CMHO 056

CMHO series

Clamping mechanics

See also

TCBENCH series

Tools and resources

Telecentric lenses tutorial
TC selection form
TC options
TC accuracy chart
Image gallery
Video gallery
Frequently asked questions
Device power ratings LED power ratings
Part number Light color, peak wavelength Min DC voltage Max DC voltage Power consumption Forward voltage Forward current Max pulse current @10% duty cycle/1kHz
(V) (V) (W) (V) (mA) (mA)
-R type red, 630 nm 12 24 < 2 2,5 300 < 1800
-G type green, 520 nm 12 24 < 2 3,5 350 < 1800
-B type blue, 460 nm 12 24 < 2 3,5 350 < 1800
-W type white 12 24 < 2 3,5 350 < 1800

 

Typical emission spectrum of white

Emission spectrum of white LEDs

Typical emission spectrum of RGB LEDs

Emission spectrum of RGB LEDs

Available colors

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

For example the part number “LTCL 064-G” defines a LTCL 064 type collimated source equipped with green (-G) LEDs.

Green light is recommended 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.

Easy and precise alignment with bi-telecentric lenses

Every collimated source up to LTCL 144-X can be mounted on the same clamping mechanics (CMHO series) used to fix and align our telecentric lenses.
You can create the perfect optical bench for any precision measurement application by interfacing our bi-telecentric lenses and LTCL collimated illuminators with these precision clamps.

Built-in electronics

You can easily adjust the light intensity of any LTCL illuminator thanks to the built-in electronics board, which ensures a constant current flow through the LED source. This delivers excellent illumination stability and increases the product lifetime.
To do so, just connect the black and brown cables to your 12/24V power supply.

Direct LED control

The inner circuitry can be bypassed in order to drive the LED directly for use in continuous or pulsed mode. To do so, simply connect the black and blue cables to your power supply or external strobe controller.
Make sure that the maximum rates are not exceeded to avoid electrical shorts.


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 LTCLxxx 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 LTCLxxx is used in combination with TC13xxx, TC12xxx or telecentric lenses designed for other sensor sizes.

 

Other videos (in English)

  • LTCL illuminators: power supply
Find more videos on our Vimeo channel

Product images

  • LTCL closeup
  • LTCL closeup
  • LTCL closeup

MEDIA

  • Screws and nuts
  • Seals and o-rings
  • Tubes and shafts
  • Coils and springs
  • LTCL closeup
  • LTCL closeup
  • LTCL closeup
  • Light paths with LTCL alignment
  • LTCL telecentric illuminator, green light
  • LTCL telecentric illuminator, green light
  • Emission spectrum of RGB LEDs
  • Emission spectrum of white LEDs
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