BenQ 2720S Service Guide - Page 15
Theory of Operation
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Chapter 3 Theory of Operation This chapter describes the optic process and the scan sequences of the Film Scanner. 3.1 Fundamental of Optic Process There are three steps for the optic process: Auto-Focusing, Imaging and Receiving. 3.1.1 Auto Focusing By moving lens cartridge forward/backward the object (film/slide) and analysis the signal to get the focus in an optimized status. 3.1.2 Imaging Applying a lens to obtain a proportionally reduced image. Figure 3-1 Imaging 3.1.3 Receiving The CCD receives the light, then transfers the intensity of light to voltage signal. The voltage signals are data for the future process. Theory of Operation API Confidential 3-1 No Copy/Reproduction allowed
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Chapter 3 Theory of Operation
This chapter describes the optic process and the scan sequences of the
Film Scanner.
3.1 Fundamental of Optic Process
There are three steps for the optic process: Auto-Focusing, Imaging and
Receiving.
3.1.1 Auto Focusing
By moving lens cartridge forward/backward the object (film/slide) and
analysis the signal to get the focus in an optimized status.
3.1.2 Imaging
Applying a lens to obtain a proportionally reduced image.
Figure 3-1 Imaging
3.1.3 Receiving
The CCD receives the light, then transfers the intensity of light to voltage
signal. The voltage signals are data for the future process.
Theory of Operation
API Confidential
3-1
No Copy/Reproduction allowed