The DCM Sistemes ALS1105A is part of the ALS Series of diffuse ringlights designed for on-axis, frontal illumination of reflective or specular surfaces in machine vision systems. It features a translucent diffuser that softens and disperses light to achieve uniform illumination, making textures homogeneous and eliminating glare. The unit has iBlueDrive technology built-in, allowing strobe, powered, and continuous operating modes through a single 3-terminal connection without a separate controller. It is available in multiple monochromatic wavelengths (blue 470 nm, green 525 nm, red 630 nm, infrared 850 nm) and uses a 2P male chassis connector supplied at 24 V DC.
Brand
DCM Sistemes
Lighting type
Diffuse Ring
Diffuser
Yes (translucent diffuser)
Color / wavelength
Blue (470 nm); also Green (525 nm), Red (630 nm), IR (850 nm)
The ALS1105A is a diffuse ringlight measuring 126 mm outer diameter by 41 mm deep, with a 34 mm inner aperture. Its defining feature is a translucent diffuser panel that completely softens the LED array into a large, uniform lambertian source. This geometry places soft, on-axis illumination coaxially with the camera, so specular surfaces — polished metal stampings, glossy plastics, PCB copper traces, pharmaceutical blister foils — reflect light back into the lens uniformly rather than producing bright spots or mirror-like hotspots. The result is a flattened, texture-revealing image on reflective parts that would otherwise be unworkable with a directional or bare-LED ring. The recommended working distance starts at 50 mm, which keeps the ring outside the lens barrel while maintaining the angular subtense needed for shadow-free diffuse coverage.
Illumination flexibility is built directly into the unit through DCM Sistemes' iBlueDrive microstrobe controller, integrated into the housing. A single 24 V DC connection via the 2P male chassis connector (PIN 1 = +24 V ±3 %, PIN 2 = 0 V) is all that is required; no external strobe driver or lighting controller box is needed. The iBlueDrive supports three operating modes — continuous, powered, and strobe — selectable through the single 3-terminal connection, allowing the installer to match the drive mode to camera shutter type and cycle time without adding panel hardware. At 7.6 W continuous in the blue 470 nm variant, thermal loading is modest, and the 410 g mass is suitable for direct lens-ring mounting on most gantry or fixed-mount setups. Supply voltage tolerance is tight at ±3 %, so a regulated 24 V rail is required.
The ALS1105A is available in four monochromatic wavelengths — 470 nm blue, 525 nm green, 630 nm red, and 850 nm near-infrared — each a separate SKU. Wavelength selection directly controls contrast on specific surface features, and the appropriate choice depends on the optical properties of the target material and the spectral sensitivity of the camera sensor. The IP30 rating is suitable for clean or light-dust environments; the unit is not rated for washdown or wet areas.
Best for
Inspection of specular or mirror-finished metal parts — stamped components, machined surfaces, turned shafts — where directional lighting would create unworkable glare or hot-spot reflections that mask surface defects
Reading 1D/2D codes and performing OCR/OCV on reflective labels, embossed packaging, or direct-part-mark surfaces where uniform frontal diffuse light removes the specular highlight that distorts symbol contrast
Electronics PCB and semiconductor inspection requiring glare-free imaging of copper traces, solder joints, BGA pads, or component markings on shiny substrates, aided by wavelength selection to maximise contrast on specific pad materials or inks
Dimensional measurement and gauging of reflective or polished parts where shadow-free uniform illumination is needed to produce clean, unambiguous edges for sub-pixel edge detection algorithms
Packaging and pharmaceutical blister-pack inspection where foil or glossy film surfaces must be checked for seal integrity, print quality, or contamination without reflective interference on an automated line
Selection notes
Working distance must be 50 mm or greater from the light face to the part surface; mounting the ALS1105A closer than this recommendation risks uneven angular coverage from the diffuser and may shadow the central field with the lens barrel — verify the lens-to-part distance in your assembly before ordering
Power supply regulation is critical: the 24 V DC supply must stay within ±3 % (23.28–24.72 V); an unregulated or noisy rail will affect LED current stability and introduce grey-level variation frame-to-frame
Wavelength choice must be matched to the surface and the camera sensor — monochrome cameras paired with a bandpass filter of the same wavelength maximise contrast and reject ambient light; if the inspection requires colour discrimination rather than reflectivity contrast, a white-LED variant should be considered instead of any of the four monochromatic SKUs
The IP30 rating means the unit is suitable only for clean, dry, dust-light environments; it must not be used in washdown, high-humidity, or heavy-particulate zones without an external enclosure — in food, pharma, or metal-cutting environments evaluate whether an IP65 or IP67 ring is required instead
The 34 mm inner aperture sets the maximum front-element diameter of the lens that can pass through the ring; confirm the lens front-element outer diameter before specifying to ensure mechanical compatibility
Specifications: General
Brand
DCM Sistemes
Lighting type
Diffuse Ring
Specifications: Interface
Connection
2P male chassis connector (PIN 1 = +24 V ±3%, PIN 2 = 0 V)
Specifications: Optical
Diffuser
Yes (translucent diffuser)
Color / wavelength
Blue (470 nm); also Green (525 nm), Red (630 nm), IR (850 nm)
No. The iBlueDrive microstrobe controller is integrated directly into the ALS1105A housing. Strobe, powered, and continuous modes are all accessible through the single 3-terminal connection, so no external controller box is required.
DCM Sistemes specifies the recommended working distance as greater than 50 mm from the light face to the target surface. Mounting closer risks non-uniform angular coverage from the diffuser panel and potential vignetting or shadowing from the lens barrel within the 34 mm aperture.
The four available wavelengths — 470 nm blue, 525 nm green, 630 nm red, and 850 nm near-infrared — each produce different contrast on different materials. The best choice depends on the spectral reflectance of the target surface and the spectral sensitivity of your camera sensor. Pairing a monochrome camera with a bandpass filter matched to the chosen wavelength will maximise contrast and reject ambient light.
The unit requires 24 V DC ±3 % (23.28 V to 24.72 V) and draws 7.6 W in continuous mode (blue 470 nm variant). An unregulated supply is not recommended because voltage excursions outside the ±3 % window will affect LED current stability and may introduce grey-level variation between frames.
The unit carries an IP30 rating, which provides basic protection against solid objects but no protection against water, moisture, or washdown. For food or pharmaceutical lines with humidity, condensation, or cleaning cycles, a higher IP-rated light (IP65 or IP67) would be required, or the ALS1105A must be housed inside a sealed enclosure.
