Cruse Scanner Specifications:
Model:
Cruse CS 220 ST (Scan head and color management upgraded in 2015)
Original
holder: 48" x 72" magnetic platform with vacuum table
Focus system: Autofocus
Scanner: 24 or 48 bit color
Max. resolution: 14.4k x 26.64k pixels
DPI: 48" x 72" @300dpi ; 23" x 45" @ 600dpi
Max. file size: 1.1 GB, 3x8 bit
Lighting: High frequency cold-cathode, 4 x 55 Watts with
texture lighting effect
Assessment of Light Exposure on the Cruse CS 220 ST
Lois Price , Senior Conservator, Winterthur
“Documents scanned on the Cruse take approximately 1½ minutes to pass under
the scanning light. Light meter measurements indicate that the scanner which
operates at an intensity of 28,000 lux (2,800 foot candles) and emits UV
radiation at the level of 40 microwatts per lumen.
"The exposure experienced by a document during a single scan is therefore
equivalent to 14 hours of exposure at 50 lux (5 foot candles) with tungsten
or other low UV lighting.”