Universal Mirror Cells - in stock.


Top view of Universal Mirror Cell

This cell takes either standard or conical mirrors from 8" to 13.1". The front plate fits the back of up to a 12.5" conical mirror.

Comes with three adjustable tube supports. Three extra tube supports are optional - for six total. Optional mirror clip sets are completely adjustable.

Perfect replacement for the Orion XT series Dobsonian - solves the problem of collimation bolts backing all the way out, requiring difficult reassembly.

 Item  
Price 
Order 
 Universal Mirror Cell for 8" to 13" primaries.
$85.00 
 Mirror Clip Set (3)
$25.00 
 Extra Tube Supports (3)
$15.00 

Universal Mirror Cell materials and specifications.

The Universal Mirror Cell is CNC precision cut 1/2" Baltic Birch plywood, 2-1/4" hex head bolts, seated securely through the top plate, through heavy duty flat ended springs, through the bottom plate, through stainless steel washers into clamping knobs. The side supports are 1/8" aluminum, which is also used as mirror clip assemblies. Wooden parts painted flat black.

Weight: 0.85 lb.
Height: 2.75" from back of collimation knobs - can be made 0.375" thinner.
Mounting: Uses 1/4-20 screws - three available positions - see this image.
1.  0.375" forward of the rear plate.
2.  0.375" back of the rear plate.
3.  0.875" back of the rear plate.
Optional Mirror Clip Set adds 0.1 lb.


Standard 8", 10" and 12.5" Mirror Cells


Top view of standard mirror cell.

Bottom view of standard mirror cell.
6" Mirror Cells - in stock
Top view of 6" mirror cell.
Bottom view of 6" mirror cell.
Mirror
Price
Weight 
Order Here  
    6"  
  $75
0.8 lbs.
 8" 
$130
1.0 lbs.
 10"  
$140
1.2 lbs.
12.5"
$150
1.4 lbs.
  
Mirror Diameter:
 
Mirror Thickness:
 
Focal Ratio:
 

Each standard mirror cell is custom designed to optimize the support points, calculating diameter, thickness, focal length and secondary mirror size using PLOP.

Materials and construction: 3/4" Baltic Birch plywood top and bottom plates. Top plate has three mirror clips seated on a 1/8" lip (won't tip) with removable #12 wood screws into the spokes of the plate. Three 3/8"x2-1/2" hex bolts pass through the top plate. Three arm with six floatation pads are attached to the sides of the top plate with stainless steel bolts. Pads extend 1/8" above the face of the top plate. Three heavy duty flat ended springs go over the bolts between the top and bottom plates. The bottom plate is incised on top to contain the bottom end of the springs. The spokes of the bottom plate have cutouts at their ends to accept nuts for 1/4" bolts which pass through the ends of the spokes, for securing the cell to your tube. Under the bottom cell plate are three stainless steel washers which go over the ends of the bolt, onto which three clamping knobs scew on to tighten the cell parts together and collimate the mirror.

Baltic Birch plywood is thermally stable and very rigid. Holes are designed in to minimize weight and allow maximum cooling, and attach a fan. 6" cells are three point support. 8", 10" and 12.5" cells are six point support. 12.5" cells can be custom designed to fit your rectangular box dimensions. Larger mirror cells upon request.

We are always working on improving our products, so above information is subject to change without notice.