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Exposure Technology
Three coloured lasers (red, green, and blue) – which are controlled by sensors and by Durst’s proprietary image creation software together with an optical system for the combining of the light beam independent of temperature – expose the digitized images one line at a time, pixel by pixel at the selected resolution of either 200 ppi or 400 ppi, on photosensitive roll materials (RA4 photographic papers and transparent or translucent photographic films). The notorious problem of reciprocity failure no longer exists, since the exposure takes place independently of the material and scale with the same exposure time.

 

Paper Transport

By means of the patented Durst paper transport system, Lambda images can be continuously and endlessly exposed without any waste of paper. The only limitation on the length of the image is the length of the roll of photographic paper (80 m/262 feet). Depending upon the model, either one or up to five rolls of paper may be loaded into the machine and then tautly drawn over the exposure slit and, after the creation of the latent image, either rolled up.The Lambda 131 HS has a paper turret with a capacity of five rolls of paper. Through the selection of the desired paper type via the workstation, the correct paper is rolled into the spool unit as in a storage carousel system. An automatic cutting device which is controlled via the workstation cuts the paper. The paper is rolled back onto the spool unit through software commands, thus avoiding paper waste when changing papers.

 

The Operating Software

Decades of experience in photographic laboratory technology are the basis for Durst’s proprietary operating software. It is intuitively self-explanatory and allows:

• Enlarging

• Reducing, scaling

• Distribution of the images into panels

• Multiple prints

• Rotating and flipping

• Autospooling

• Autonesting for the fullest exploitation of the paper width

• Colour Management

• Softproofing with on screen image correction

• Batch processing

• Image correction in density and colour

 

The data for photographic papers can be individually stored for each customer, having been optimally calibrated through Durst’s proprietary calibration software with an automatic densitometer. In this way, the exposure calibration code can be called up at any time.Through unique LINUX on-the-fly technology, the calculation of size, ripping, exposure, and the processing of the data all take place simultaneously - without preprocessing and creating a print file and without placing a load on the hard disk or the network traffic.