HOME UP TUBE DIAGONAL ASSEMBLY DOBSONIAN EQUATORIAL PLATFORM

MIRROR CELL ASSEMBLY 

CONSTRUCTION
MIRROR MARKING
MIRROR FIXING

                       After the fun of building the tube, the next job was to construct the mirror cell. The basic idea is to make a strong, rigid base on which the mirror can be fixed in such a way that it can be tilted any way about the major axis of the tube. It also needs to be able to be moved forwards and back.

Pic of mirror cell  Here's my completed mirror cell. The mirror is glued to a disk of 3/4" chipboard and the back-plate is a piece  of 1/2" plywood. Three spring - loaded bolts hold the two pieces together, adjustable all ways by three threaded knobs on the rear. This is an essential feature to allow in-the-field collimation adjustment.

 

 

mirror cell layout

 

Cell assembly side view

 

       REAR OF MIRROR CELL

MIRROR MARKING

MIRROR FIXING

 

 

 

FRONT OF MIRROR CELL

 

 

finished cell

Finished !

 

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