Telecentric lenses and optical systems for imaging, sensors, metrology, lighting and lasers.

Telecentric lenses and optical systems for imaging, sensors, metrology, lighting and lasers.

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LT CL SERIES: COLLIMATED (TELECENTRIC) LED ILLUMINATORS

Opto Engineering® Collimated Light (CL) LED illuminators have been specifically designed for back-illuminating objects imaged by telecentric lenses. This type of illumination is strongly recommended for high accuracy measurement of round or cylindrical parts where diffusive back lighters 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 very high signal-to-noise ratios.
  • BORDER EFFECTS REMOVAL: diffused back-illuminators often make objects seem smaller than real 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.

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Available Colours Mechanical Specs Compatible Telecentric Lenses
Part Number Beam /R /G /B /W /IR /IR Length Outer TC13yyy TC12yyy TC23yyy TC4Myyy TC2Myyy TCLyyy Datasheet Get a
Quotation
diameter 890 940 diameter yyy= yyy= yyy= yyy= yyy= yyy= &
(*) (mm) (mm) (mm) Drawing
LT CL 23/x 16 x x x x x x 88,6 28 n.a. n.a. 04,07,09 04,07,09 n.a. n.a. LT CL 23/x
LT CL 16/x 20 x x x x x x 86,7 38 n.a. 16 16 16 16 n.a. LT CL 16/x
LT CL 24/x 30 x x x x x x 100,0 44 n.a. 24 24 24 24 n.a. LT CL 24/x
LT CL 36/x 45 x x x x x x 138,9 61 36 36 36 36 36 n.a. LT CL 36/x
LT CL 48/x 60 x x x x x x 174,0 75 n.a. 48 48 48 48 040 LT CL 48/x
LT CL 56/x 70 x x x x x x 197,3 80 n.a. 56 56 56 56 n.a. LT CL 56/x
LT CL 64/x 80 x x x x x x 219,5 100 64 64 64 64 64 060 LT CL 64/x
LT CL 80/x 100 x x x x x x 264,2 116 n.a. 80 72, 80 72, 80 80 080 LT CL 80/x
LT CL 96/x 120 x x x x x 309,6 143 96 96 85, 96 85, 96 96 120 LT CL 96/x
LT CL 120/x 150 x x x 395,2 180 n.a. 120 110, 120 110, 120 120 n.a. LT CL 120/x
LT CL 144/x 180 x x 454,7 200 n.a. 144 130, 144 130, 144 144 n.a. LT CL 144/x
LT CL 192/x 250 x x 595,1 260 n.a. 192 172, 192 172, 192 192 n.a. LT CL 192/x
LT CL 240/x 300 x x 756,8 322 n.a. n.a. 200, 240 200, 240 n.a. n.a. LT CL 240/x

(*) The last digits of the Part Number, "/x", define the source's colour.


The illuminator light colour can be defined according to the following options:
/R = red
/G = green
/B = blue
/W = white
/IR890 = infrared, peak at 890 nm
/IR940 = infrared, peak at 940 nm

For example the Part Number "LT CL 64 /G" defines a LT CL 64 type collimated source equipped with green (/G) LEDs.
/G (green) light sources are the recommended choice for high precision measurement applications: green light ensures the best optical performances in terms of distortion and telecentricity, as well as giving the highest signal/noise ratios and the best image resolution.

 

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