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DCM Sistemes BKL4005A machine vision lighting
DCM SistemesBacklights
  • Rosepetal compatible
  • Recommended by AIS Vision

DCM Sistemes BKL4005A Backlight

BKL4005A

The BKL4005A is a rectangular ultra-diffuse backlight measuring 404 x 66 x 22 mm with a 50 x 400 mm active emitting surface, designed to produce high-contrast silhouettes for edge detection and measurement. It is offered in blue (470 nm), green (525 nm), red (630 nm), infrared (850 nm) and white (W00) versions and in three operating types: Continuous (C), iBlueDrive (i) and Strobe (S). All versions run on 24 VDC (±3% continuous, ±8% iBlueDrive); the continuous version connects via a 2-pole on-chassis connector with no external driver, the strobe version requires an external strobe controller, and the iBlueDrive version uses a 3-pole 150 mm aerial connector. An optional /65A modifier provides an IP65 rating.

Brand
DCM Sistemes
Lighting type
Backlight (area / ultra-diffuse)
Color / wavelength
Red 630 nm (also available: blue 470 nm, green 525 nm, IR 850 nm, white W00)
Available wavelengths
470 nm (blue), 525 nm (green), 630 nm (red), 850 nm (IR), W00 (white)
Mode
Continuous (C); also Strobe (S) and iBlueDrive overdrive (i)
Diffuser
Yes (ultra-diffuse emitting surface)
Illuminated area
Active surface 50 x 400 mm
Supply voltage
24 VDC (±3% continuous, ±8% iBlueDrive)
Controller required
No for continuous version; external strobe controller required for strobe version
Connection
Continuous/Strobe: 2-pole on-chassis; iBlueDrive: 3-pole aerial 150 mm; optional IP67 ST00/ST01
IP rating
IP65 with optional /65A modifier (IP67 connector option on iBlueDrive)
Dimensions
404 x 66 x 22 mm (external)
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Technical overview

The BKL4005A is an ultra-diffuse LED backlight from DCM Sistemes built around a 50 x 400 mm active emitting surface inside a 404 x 66 x 22 mm housing. As a backlight, its job is not to illuminate a part's surface but to sit behind or beneath it and flood the field with even, directionless light so the object reads as a black silhouette against a uniform bright field. The long, narrow 50 x 400 mm aperture is the defining trait: it is tuned to back-light elongated parts, parts moving along a conveyor lane, or a row of features that must be measured across a wide field in a single 400 mm-long pass. The ultra-diffuse emitting surface (the diffuser spec is explicitly present) is what makes silhouette edges crisp and repeatable, which is the precondition for any sub-pixel edge-detection or dimensional gauging algorithm to return stable numbers.

Wavelength is selectable across the DCM range: the configured unit is red 630 nm, with blue 470 nm, green 525 nm, IR 850 nm and white W00 also available. For pure contour and gauging work the choice of color mostly governs how the backlight pairs with a monochrome sensor and any matched bandpass filter. Because all silhouette information is carried by the transition from the bright field to the dark object, a monochrome camera matched to the chosen wavelength and a bandpass filter on the same line will reject ambient light and maximize contrast at the part edge. Selecting a single dominant wavelength rather than white also lets the filter pass only the backlight's color, which is what stabilizes the edge against changing ambient conditions.

Electrically and mechanically the unit is straightforward to design in. It runs on 24 VDC and is offered in three operating types that change how you wire it: the Continuous (C) version needs no external driver and connects through a 2-pole on-chassis connector, so it can run straight off a 24 VDC supply (held to +/-3%); the Strobe (S) version requires an external strobe controller to pulse it in sync with the camera trigger; and the iBlueDrive (i) overdrive version uses a 3-pole 150 mm aerial connector and a wider +/-8% supply tolerance. The standard catalog IP rating is reached with the optional /65A modifier giving IP65, and an IP67 connector option (ST00/ST01) is available on the iBlueDrive variant for wetter or wash-down environments.

Best for

  • Dimensional measurement and edge gauging of elongated parts up to ~400 mm across, where a high-contrast silhouette is needed for sub-pixel edge detection
  • Contour and presence/absence inspection of parts moving along a conveyor lane, using the long 50 x 400 mm field to cover a wide pass
  • Packaging inspection - checking fill level, cap presence, label edges or seal geometry by silhouette against the bright field
  • Defect and surface inspection where a back-lit silhouette reveals chips, burrs, missing material or profile deviations on the part outline
  • Strobed freeze-motion gauging on fast lines using the Strobe (S) or iBlueDrive (i) overdrive versions synchronized to the camera trigger

Selection notes

  • Match the operating type to your line: choose Continuous (C) for the simplest install (24 VDC, 2-pole on-chassis connector, no driver), Strobe (S) when you must pulse in sync with the camera and can add an external strobe controller, or iBlueDrive (i) for overdrive output via the 3-pole 150 mm aerial connector.
  • The 50 x 400 mm active surface sets your usable field - the part or feature row you are silhouetting must fit within that emitting area, and the camera field of view should sit fully inside it so edges stay against the bright field, not the dark frame.
  • Pick the wavelength to suit the camera and filter strategy: 630 nm red as configured is a general-purpose choice, blue 470 nm, green 525 nm or IR 850 nm are also offered; pair the chosen color with a monochrome camera and a matched bandpass filter for best contrast.
  • Confirm environmental needs early: the IP65 rating requires the optional /65A modifier (it is not standard), and IP67 sealing is only offered as a connector option (ST00/ST01) on the iBlueDrive version.
  • Budget the supply accordingly - the continuous version expects 24 VDC held to +/-3%, while the iBlueDrive version tolerates +/-8%; a clean, regulated 24 VDC rail and correct connector (2-pole on-chassis vs 3-pole aerial) must be planned per variant.

Specifications: General
BrandDCM Sistemes
Lighting typeBacklight (area / ultra-diffuse)

Specifications: Interface
ConnectionContinuous/Strobe: 2-pole on-chassis; iBlueDrive: 3-pole aerial 150 mm; optional IP67 ST00/ST01

Specifications: Optical
Color / wavelengthRed 630 nm (also available: blue 470 nm, green 525 nm, IR 850 nm, white W00)
Available wavelengths470 nm (blue), 525 nm (green), 630 nm (red), 850 nm (IR), W00 (white)
DiffuserYes (ultra-diffuse emitting surface)

Specifications: Electrical
ModeContinuous (C); also Strobe (S) and iBlueDrive overdrive (i)
Supply voltage24 VDC (±3% continuous, ±8% iBlueDrive)
Controller requiredNo for continuous version; external strobe controller required for strobe version
Driver technologyiBlueDrive intelligent overdrive option available

Specifications: Environment
IP ratingIP65 with optional /65A modifier (IP67 connector option on iBlueDrive)

Specifications: Geometry
Illuminated areaActive surface 50 x 400 mm

Specifications: Mechanical
Dimensions404 x 66 x 22 mm (external)

Frequently asked questions

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