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Line scan lights

Line scan lights put a narrow, very bright and uniform line on moving web, sheet and conveyor inspection for line-scan cameras. Choose cooling by duty and brightness: passive, fan or water cooled, plus coaxial and dual-angle versions.

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Line scan lights

193-216 of 763 models

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LS-LSC-0666Line Scan Light, 1970 mm, White White1900 mm × 17 mm1970 mm × 58 mm × 90.1 mm820.8 W--$5,329.00Quote Ships in 2-3 weeks
LS-LSC-0664Line Scan Light, 1770 mm, White White1700 mm × 17 mm1770 mm × 58 mm × 90.1 mm734.4 W--$4,789.00Quote Ships in 2-3 weeks
LS-LSC-0663Line Scan Light, 1670 mm, White White1600 mm × 17 mm1670 mm × 58 mm × 90.1 mm672 W--$4,519.00Quote Ships in 2-3 weeks
LS-LSC-0659Line Scan Light, 1170 mm, White White1100 mm × 17 mm1170 mm × 58 mm × 90.1 mm480 W--$3,169.00Quote Ships in 2-3 weeks
LS-LSC-0661Line Scan Light, 1370 mm, White White1300 mm × 17 mm1370 mm × 58 mm × 90.1 mm576 W--$3,709.00Quote Ships in 2-3 weeks
LS-LSC-0660Line Scan Light, 1270 mm, White White1200 mm × 17 mm1270 mm × 58 mm × 90.1 mm514.8 W--$3,439.00Quote Ships in 2-3 weeks
LS-LSC-0656Line Scan Light, 870 mm, White White800 mm × 17 mm870 mm × 58 mm × 90.1 mm384 W--$2,359.00 Ships in 2-3 weeks
LS-LSC-0658Line Scan Light, 1070 mm, White White1000 mm × 17 mm1070 mm × 58 mm × 90.1 mm432 W--$2,899.00Quote Ships in 2-3 weeks
LS-LSC-0657Line Scan Light, 970 mm, White White900 mm × 17 mm970 mm × 58 mm × 90.1 mm393.6 W--$2,629.00Quote Ships in 2-3 weeks
LS-LSC-0655Line Scan Light, 770 mm, White White700 mm × 17 mm770 mm × 58 mm × 90.1 mm307.2 W--$2,089.00 Ships in 2-3 weeks
LS-LSC-0653Line Scan Light, 543 mm, White White500 mm × 17 mm543 mm × 58 mm × 90.1 mm216 W--$1,549.00 Ships in 2-3 weeks
LS-LSC-0652Line Scan Light, 420 mm -400 mm × 33 mm420 mm × 113 mm × 45 mm96 WWhite-$1,269.00 Ships in 2-3 weeks
LS-LSC-0650Line Scan Light, 393 mm, White White350 mm × 17 mm393 mm × 58 mm × 90.1 mm173 W--$1,139.00 Ships in 2-3 weeks
LS-LSC-0654Line Scan Light, 643 mm, White White600 mm × 17 mm643 mm × 58 mm × 90.1 mm259.2 W--$1,809.00 Ships in 2-3 weeks
LS-LSC-0649Line Scan Light, 343 mm, White, size 343 mm × 58 mm × 90.1 mm White300 mm × 17 mm343 mm × 58 mm × 90.1 mm129.6 W--$1,009.00 Ships in 2-3 weeks
LS-LSC-0651Line Scan Light, 443 mm, White White400 mm × 17 mm443 mm × 58 mm × 90.1 mm172.8 W--$1,279.00 Ships in 2-3 weeks
LS-LSC-0647Line Scan Light, 143 mm, White, size 143 mm × 58 mm × 90.1 mm White100 mm × 17 mm143 mm × 58 mm × 90.1 mm48 W--$459.00 Ships in 2-3 weeks
LS-LSC-0646Line Scan Light, 143 mm, Red Red100 mm × 17 mm143 mm × 58 mm × 90.1 mm48 W-625 nm$459.00 Ships in 2-3 weeks
LS-LSC-0644Line Scan Light, 216 mm, White White200 mm × 17 mm216 mm × 53 mm × 81.8 mm33.6 W--$729.00 Ships in 2-3 weeks
LS-LSC-0648Line Scan Light, 243 mm, White, size 243 mm × 58 mm × 90.1 mm White200 mm × 17 mm243 mm × 58 mm × 90.1 mm96 W--$739.00 Ships in 2-3 weeks
LS-LSC-0643Line Scan Light, 116 mm, White White100 mm × 17 mm116 mm × 53 mm × 81.8 mm16.8 W--$459.00 Ships in 2-3 weeks
LS-LSC-0641Line Scan Light, 1556 mm, White White1500 mm × 17 mm1556 mm × 45 mm × 49.8 mm230.4 W--$4,209.00Quote Ships in 2-3 weeks
LS-LSC-0645Line Scan Light, 316 mm, White White300 mm × 17 mm316 mm × 53 mm × 81.8 mm50.4 W--$999.00 Ships in 2-3 weeks
LS-LSC-0637Line Scan Light, 788 mm -750 mm × 17 mm788 mm × 45 mm × 71 mm115.2 WWhite-$2,209.00 Ships in 2-3 weeks

How to choose a line scan light

A line scan camera builds its image one row of pixels at a time while the web or part moves past. It needs light only on a narrow stripe, but that stripe must be very bright, because each line is exposed for microseconds, and very even along its length, because any dip shows up as a streak through every image. A line scan light has a long, narrow emitting window, often with a lens that focuses the LEDs into a thin, intense line.

1. Length: cover the scan line plus margin

The lit length must be longer than the field of view the camera sees across the web. Brightness falls off over the last few centimetres at each end, so add margin on both sides - roughly 10% of the field width, or more when the light sits far from the part. Lengths here run from short units of under 100 mm for narrow parts and lab setups to bars of 2 m and more for full-width web inspection; several ranges come in fixed steps (for example 75 mm or 150 mm increments), so you can match the web width closely.

2. Brightness: work back from the line rate

The exposure time of a line scan camera is at most the line period: at 50 kHz a line has 20 µs. Use the line rate calculator to get the line rate from web speed and pixel size, then pick a light that gives enough signal in that time. Focused (condensing) versions put the LED output into a narrow line and give the highest brightness at their focal distance; diffuse versions spread the light and tolerate height changes better. Electrical power in this category runs from a few watts for mini lights to several hundred watts for long high-power bars, and the highest-power models are fan or water cooled.

3. Lighting geometry

  • Bright field (specular): light and camera at equal and opposite angles to the surface. Shiny surfaces look bright; scratches and dents look dark.
  • Dark field (oblique): light at a low angle and camera looking straight down. A flat surface stays dark and raised or broken features scatter light into the lens.
  • Coaxial line light: the camera looks through a half-mirror along the light axis. For flat, mirror-like webs such as foil, glass and wafers - the line scan version of a coaxial light.
  • Tunnel, double-angle and multi-angle: light from two or more directions to fill in shadows on embossed, curved or textured material.
  • Transmitted: light under the web shining up into the camera, for holes, pinholes, coating gaps and contamination in film, nonwovens and glass.

4. Colour and wavelength

White suits colour line scan cameras. On mono cameras a single colour gives more contrast: red for general use and long LED life, blue for fine surface detail on metal, green as a compromise, UV to excite fluorescent inks, adhesives and coatings, infrared to see through some dyes and printing. A few models emit in the SWIR band for SWIR line scan cameras.

5. Driving, strobing and cooling

Line scan lights here run on 24 V DC or, for many of the longer and high-power bars, 48 V DC, so check which before choosing a light controller. The controller must supply the full power of the bar with margin; long bars may have two cables. Some ranges include an inline driver with analog dimming and overcurrent strobe from a PNP or NPN trigger. Fan- and water-cooled versions need airflow or a water supply.

What this category covers

ParameterRange in this category
Lit lengthunder 100 mm to over 2 m (several series to about 3 m)
Emitting widthcommonly 10-28 mm; wider tunnel and area versions
Colourswhite, red (625 / 660 nm), blue (455 / 470 nm), green (520-530 nm), UV (365 / 395 nm), IR (730 / 808 / 850 / 940 nm), RGB, SWIR on a few models
Supply24 V DC or 48 V DC
Coolingnatural, fan or water
Typesstandard, high power, high uniformity, focused, collimated, polarized, coaxial, oblique, tunnel, multi-angle

Browse white line scan lights or infrared line scan lights.

Typical applications

  • Surface defects on steel, aluminium and copper strip, foil and battery electrode coatings.
  • Print inspection on labels, packaging film and printed sheet.
  • Glass, display panels and film: scratches, bubbles, inclusions, using bright field or transmitted light.
  • Nonwovens, paper and textiles: holes, thin spots and contamination with a light under the web.
  • Cylindrical parts rotated under the camera to unroll the surface into one flat image.

Common mistakes

  • Choosing the lit length equal to the field of view: the image ends go dark and the edge of the web is missed.
  • Mounting a focused light at the wrong distance. The line is only thin and bright near its focal distance; a few millimetres off and brightness drops sharply.
  • Sizing brightness for an area scan exposure. A line scan exposure is microseconds, not milliseconds.
  • Ignoring flicker from PWM dimming that is not synchronised to the camera, which shows as bands across the image. Use a constant-current or strobed controller synchronised to the line trigger.
  • Not running flat-field correction in the camera after the light is installed, so residual non-uniformity stays in every image.

Questions

Can I use a bar light instead of a line scan light?
For slow lines and short fields, a bar light can work. For high line rates the narrow, focused output of a line scan light puts much more of its output on the scan line from the same power.

Focused or diffuse?
Focused for the most brightness on flat material at a fixed distance. Diffuse when the surface is shiny and wrinkled, or the material height changes, since a diffuse line is less sensitive to distance and angle.

How far from the web should the light sit?
Use the recommended working distance printed on the product page. Where stated, recommended distances in this category run from about 10-30 mm for compact units to 10-500 mm for large high-power bars.

What else does a line scan station need?
A line scan camera, a line scan lens that covers the sensor length, an encoder trigger and a controller. Configure the system to match them.