Hand of the maker

[mmcirvin]

The makers of kitschy commercial religious art of the Christian persuasion should be grateful to the telescope builders of the world for so often putting the secondary mirror struts in a cross shape.

Comments

[mmcirvin.livejournal.com]

You'd pretty much need something like a hologram placed across the mouth of the telescope. That's what a hologram is--a diffraction grating constructed so as to make an arbitrarily funky image in the diffracted light.