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.
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.
Paycheck
telephone
A collimator is used to "bore sight" a scope. It will help ensure that the scope is close to being properly aligned.
To conduct a lunar laser ranging experiment at home, you will need a powerful laser pointer, a telescope, a tripod, and a clear night sky. Set up the telescope on the tripod and point it towards the moon. Use the laser pointer to send a beam towards the moon and wait for the reflection to return. Measure the time it takes for the laser beam to travel to the moon and back to calculate the distance. This experiment requires precision and caution when handling the laser.
Tungsten
collimator
Lines will be formed at the opposite side of the observer if the ruled surface of grating faces the collimator due to reflection
To collimate a Dobsonian telescope for optimal performance, adjust the primary and secondary mirrors so they are aligned properly. Use a collimation tool to make sure the mirrors are centered and aligned with each other. Fine-tune the collimation by adjusting the screws on the secondary mirror holder and the primary mirror cell until the telescope produces sharp and clear images.
well to my calculations the telephone and the computer are most recent
allow only parallel rays from strem of rays
The YOSCO - much better