The concept of collimation is a very unique concept and is a perspective used to make corrections in laboratories. It also plays a vital role in astronomy. Today’s standard 8-inch telescopes can see distant quasars and galaxies, how these ordinary telescopes make these distant objects clear. The answer is that today’s telescopes often come with laser or optical collimators. Before looking at what a laser collimator is, it is first necessary to know what a beam of beam means.
What is Collimation?
When light passes through any refraction object, it undergoes a certain amount of diffraction. Light beams are scattered and do not reach the observers; they also have scattered angles, not parallel light rays. On the other hand, a collective beam of light is a beam of light with excessively parallel rays of light. Thus, collimation is defined as the process of converting scattered light into a beam of light with multiple parallel rays. A collective beam of light is a beam with a low beam deflection (typically a laser beam) so that the beam radius does not undergo significant changes in medium span distances. In the case of simple and common Gauss beams, Rayleigh means that the length should be longer than the projected span. A collimator light beam is a tapering device. The narrowing of a beam of light can have two meanings. The first is to arrange the beam of light in a certain direction, and the second is to shrink the spatial cross-section of a beam It comes.
How to Collect the Laser Beam
The laser can be defined as a device that produces a consistent beam of high intensity monochromatic light. Most of the normal lasers used by civilians are laser diodes. Unlike gas or crystal laser equivalents found in laboratories, laser diodes have a serious divergence level. A diode laser beam has low wavelength quality, severe astigmatism and elliptical problems. Astigmatism in a laser diode usually refers to the level of deviation that the laser beam from the laser diode faces. In addition, elliptical rays can cause some leakage from the edges of the laser; Instead of creating a perfect spot, they form a small ellipse. Both of these problems can be corrected using several optical corrections.
The simplest and most popular way to collect laser diode beam is to use a single aspherical lens. The greater the focal length of this lens, the larger the beam diameter after irradiation. Also, for example, if a certain beam adjustment is required to expand the beam radius of a collective beam, two lens systems are often used and this is called a telescope. A lens with a negative focal length and a lens with a positive one form an installation for collecting and expanding or narrowing the beam. To correct the elliptical problem, an elliptical beam collected by expanding in the slow axis direction in the form of an ellipse or by compressing in the fast axis direction can be circularized.
Laser Collimator telescope
A laser collimator allows to properly align the optics of the reflective telescope. First, the laser collimator is used to determine if the secondary mirror points directly to the center of the primary mirror. The first thing to do is to polish the laser collimator through the tube of the telescope. It should be ensured that the laser collimator is firmly seated without any movement. This ensures that the laser collimator is correctly aligned without any bending or shifting. The laser beam will reflect the secondary mirror and reach the primary mirror. The primary mirror usually has a small marking tape on it. The laser is aligned to hit this pointer, and the secondary mirror is then oriented and focused accordingly.
The collision of the laser is done for a very good reason. Theoretically, it helps to align the focus of the image at infinity and this increases the clarity of distant celestial bodies. Let’s take a theoretical example that can explain why the laser is used to collide in telescopes. The addition problem occurs when distant objects appear as point sources. It should be noted that no matter which lens is used, the radius of the beam and the beam deflection have a mutual relationship. Therefore, if the focal point will be infinite, it causes the beam angle to be zero and thus adds the light beam.
Laser Collimation in Laboratories
Beam laser beams are very useful in laboratory installations because the radius of the beam remains approximately constant, so the distances between the optical components can be easily changed without extra optics and excessive radii of radii are avoided. Most solid-state lasers emit naturally collected rays; a straight output coupler forces the straight wave front (ie a beam waist) at the outlet, and the beam waist is usually large enough to prevent excessive deflection. However, edge-emitting laser diodes emit strongly deviating rays and are therefore often equipped with collimation optics. With at least one rapid axis collimator, it greatly reduces the strong deviation in the rapid direction. For fibers, a simple optical lens can usually be sufficient for collimation, but beam quality can be better maintained with an aspherical lens.