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		Tubes and shafts
	Screws and nuts		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 series

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

TC16M series

Telecentric lenses for Full Frame and 8 k pixel line detectors

TC12K series

Telecentric lenses for 12k and 16kpx linescan cameras

CMHO series

Clamping mechanics

Tools and resources

Telecentric lenses tutorial

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

Typical 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.

Company & Resources