A collimator is used to "bore sight" a scope. It will help ensure that the scope is close to being properly aligned.
The cost of a laser collimator depends on the type of telescope you have. One could be looking at spending anywhere between $70 and $200 on a laser collimator.
collimator
Tungsten
Lines will be formed at the opposite side of the observer if the ruled surface of grating faces the collimator due to reflection
allow only parallel rays from strem of rays
size of the facial tissue exposed to x-rays.
pin hole gamma ray camera & collimator
the lead diaphragm colloctaded with aluminum filter.the diaphragm or collimator is constructed of 1/16inch lead
The collimator present in a spectrometer convert the rays from the source to parallel rays .Telescope is used to watch the parallel rays which means for the telescope the object is located at infinity.so that we use telescope.
collimator
Roscoe Koontz is famous for inventing the pinhole gamma ray camera.
Power of the X-ray tube, voltage applied, current intensity, anticathode type, filters, collimator, tube design, working atmosphere, etc.