Snapshots of the MDS-JA3ES Optical Block

Graham Baker

Here are a few snapshots of the MDS-JA3ES optical block assembly

Top View

Top View - Detail
Showing lens with and focusing coils immediately next to it

Side View
Side of lens just visible - top centre
Gold block at bottom houses laser diode and mirrors (?)
Small circuit board at right (edge on) connects to photo-cell in main housing, this detects the reflected output from the MD surface(?)

Front View
Pencil shows photo-diode (output signal?)
The block assembly would slide along a shaft through the two bronze bushes, driven by the 'rack & pinion' gear  at the rear

Front View - close-up
Detail of lens assembly & focusing coils


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