2D / matrix codes Incident light illumination Eye safety Bar lighting bar light Barcodes, Linear barcodes Lighting Lighting controller Illuminance Lighting techniques Lighting types Irradiance Image analysis Image processing Image processing system Blue light hazard Flash control Brewster angle BV Cloudy Day lighting Controller DataMatrix code Diffuse backlighting Diffuse incident light DIN rail / top-hat […]
The following points/questions must be considered if good and solution-oriented lighting is to be designed for a vision system: – Monochrome / color (wavelength) – Diffuse or direct / directional lighting – Angle of incidence – Unpolarized or polarized (linear, circular) – Speed of the application – Size of the illuminated area – Light quantity […]
2D codes consist of polygonal, usually squarely arranged groups of data cells with a typical orientation symbol by which the code type can be recognized. Frequently used examples are the QR code and the Data Matrix code. See also Barcode. 2D codes have built-in error correction, which enables data to be recovered even if the […]
Illuminations that are designed to be two-dimensional. They are available as backlight or transmitted light illumination as well as incident light illumination (with and without camera view), diffuse or direct beam. Example of incident light area lighting with camera view(TOP-LIGHT-8-CO). Büchner Lichtsysteme offers a wide range of surface lighting systems.
With backlighting or transmitted light illumination, the object is located between the light source and the camera. The camera sees the object as a shadow. This type of illumination therefore produces excellent contrasts and is well suited for surveying tasks. Example of a backlight (source: Vision Doctor) A distinction is made between diffuse backlighting, directional […]
Incident light illumination, consisting of one or a few rows of LEDs. Creates a light strip on the test object. Can be irradiated at different angles to increase or decrease reflections. If the beam illumination is aligned at a small (flat) angle to the test object, this is referred to as dark field illumination. Other […]
Collective term for barcodes, bar codes or bar codes with an optically-electronically readable print image consisting of parallel bars of different widths at different distances from each other. The code refers to the representation of the data information in binary symbols. Barcodes can be captured with reading devices (cameras, scanners) and processed electronically. The barcodes […]
Blue light hazard (BLH) is defined as a risk to the retina from radiation in the range of approx. 410 to 480 nm (half-width) with a maximum sensitivity at 440 nm. This high-energy blue light can cause so-called photoretintis, photochemical damage to the retina caused by degeneration of the macula (AMD; damage to the retinal […]
If unpolarized light falls on the interface of two media at the Brewster angle, the reflected light is polarized perpendicular to the plane of incidence. See also Wikipedia
