Binoculars are a good tool for observing the night sky. First, they are mobile, you can take with you everywhere; in the case of smaller magnifications give the opportunity to observe without a tripod (binoculars are especially prized by the parameters 10×50 i 7×50), so you can quickly explore the sky. A great advantage of the observation
by binocular stereoscopic vision is.
One of the most common defects found in binoculars is the optical axis nierównoległość. It is said, Ze lornetka but “black”. Even with ground-based observations it is tiring – the observation of stars image is not acceptable, just all the stars we see double. To some extent, the brain consists of a double image in a, However, above a certain value, it becomes impossible. When the telescope optical axis parallelism is on the boundary adjustment capabilities of our brain, may happen, double image that is still lodged in a, But very quickly comes to the eye and head pain.
Empiricism revealed, that the eyes do not feel tired, the convergence of rays emerging from the eyepiece of the main does not exceed the angle 1 degree, in a plane passing through the center of eye pupils. While the major divergence of rays emerging from the eyepiece may occur 3 degrees and the divergence in the direction perpendicular to a plane passing through the center of the pupils may not exceed 30 second.
Good binoculars are usually embedded in the lens of the lens used to adjustment eccentricity.
Objective lens binoculars. After removing the cover can be seen the rings eccentricity.
In amateur conditions appropriate to set the binoculars is difficult, although possible. It is turning the eccentrics in the lenses to check the effect of this action on some very distant object. If we consider that the two images overlap, it is yet to see the effect of this action on the stars. This is the best test, What can be done home-.
Some binoculars have lenses attached to a centering ring, while in the case of prisms are screws that can be used slightly tilted prisms and thus kolimować binoculars. The new binoculars often do not see these screws, There are in fact under the rubber veneer. To get to them, be separated gently around the gum and stick it back surgery such as: butaprenem. With a little practice you keep your gums and only whole site, where are the screws. In the older binoculars (black, solid metal with a matte veneer) collimation screws are either easily visible in small wells in the veneer, or are pitched black substance. Then it is harder to locate them, magnifying glass may be helpful. In the old binoculars occurs, that used for the collimation screws are so baked, the only way to repair the old binoculars is drilled screws and enforce new, somewhat larger than the thread.
The most difficult for the collimation of binoculars which are the two prisms are closely interlocked fixed on a special plate. This disc is then the six screws,located in pairs, this solution is analogous to that used in the fittings of the main mirror telescopes. The collimation of binoculars is so much more work, that after each intervention in the plate is discussed with the need to make prism binoculars, check the effect and possibly spread over, to get to the screws in the plate and correct operation.
Often rozkolimowanie binoculars is a consequence of the collapse or shock. It may be then, that it can not by themselves justify turning the eccentrics of the lens. It then unscrew the lens and see if there has been no shift in any of the prisms. They are seated in their slots and
pressed flat springs. If the notice,that one is not wrong prism to the plane of its socket, is strangely skewed, This should release the flat spring, Gently place the lens in place and press it again spring.
Prism binoculars visible after removing the lens
It is important that the cutting of binoculars do not touch any of the active surface of the lenses and prisms. Left fingerprints on them really interfere with the observations. If you have already reached dirty glass, best to wash it with pure alcohol (even the food, rectified), in no case may be, however, salicylic alcohol. Pollens and other minor impurities preferably are removed by blowing a stream of air from the rubber bulb (sold in pharmacies), can also assist with a brush or badger hair squirrel.
Collimation professional binoculars and other instruments dwuocznych performed using binocular lunetki and wide field collimator, possibly two collimators with a wide field, whose optical axes are parallel.
Lunetki binocular glasses are marked with the tolerance, which should be visible in kolimatorach crosses a wide field
Photo:
Field tolerance together with the cross visible in the eyepiece binocular lunetki
My studio has an optical bench equipped, inter alia, reflected laser binocular and collimators for wide field so we can fully professionally kolimować binoculars.
10x50 binoculars during adjustment using binocular and collimators lunetki