What is the role of differentiation plates in telescopes? The role of the telescope

Hello, I'm in the optical industry, the differentiated version, aiming is to aim, there are some scales in it, that, it's about the same as the scale of the front sight or the "advance amount".

The differentiation in the telescope is actually used for rough measurement of distance, for example, a person, according to the height of the meter, at 100 meters and at 400 meters, the height must be different in the telescope. So based on this rough estimate of the distance.

It should be noted that there are now differentiated telescopes, most of which are inferior products, and they are advertised as "military" and so on.

With wire, this has long been eliminated.

Nowadays, differentiation is produced by electroplating metal on glass, or by using glass etching.

In addition to this, if you are interested in optical glass, optical lenses, and the internal structure of telescopes, you can take a look.

There is some introductory knowledge that follows.

In addition, I almost forgot to say that differentiation, this also has requirements for the installation location.

1. Locate and calculate the distance of the target from you. The military term is called the Secret Position Formula.

Formula: l=1000xh a

In the formula: l represents the distance (meters) from the observer to the target

h indicates the width or height of the target in meters

A represents the high and low angle of the target or the direction angle of the target (dense position) measured by the differentiated version of the telescope, 2, which is generally only used in the military, as shown in the figure below

The differentiation plate is a combination of wires with crosshairs or other functions such as ranging and measuring advance Differentiation plate is a combination of wires with crosshairs or other functions such as ranging and measuring advance.

Observing things in the distance, it can also be used to peek at beautiful women bathing in the river

Buy a practice to know.

...This also needs to be asked. It's not about seeing far.

Level. English: level) is an instrument that establishes a horizontal line of sight to determine the height difference between two points on the ground. The principle is to measure the height difference between ground points according to the leveling principle. The main components are the telescope, the tube leveler (or compensator.

Vertical axis, pedestal, foot spiral. According to the structure, it is divided into micro-inclination level, automatic leveling level, laser level and digital level (also known as electronic level). According to the accuracy, Shouno is divided into precision level and ordinary level.

Automatic leveling level, when the bubble of the circle level is centered on the instrument is flattened, it can read the reading when the visualizer shouts the line level in the morning without manual adjustment. It simplifies the operation procedures and increases the speed of operation to reduce the observation error caused by changes in external conditions. The DS3 level is just a little more troublesome to operate.

A telescope is an optical instrument that uses lenses or mirrors and other optical devices to observe distant objects. Light rays that are refracted through a lens or reflected by a concave mirror allow them to enter a small hole and converge for imagery, and then pass through a magnifying eyepiece to be seen. Also known as "clairvoyant mirror".

The first purpose of a telescope is to magnify the opening angles of distant objects, so that the human eye can see details with smaller angular distances. The second function of the telescope is to feed the beam of light collected by the objective lens that is much thicker than the diameter of the pupil (up to 8 mm) into the human eye, allowing the observer to see faint objects that were previously invisible. In 1608, Hans Lieberch, a Dutch optician, stumbled upon the idea that he could see in the distance with two lenses, and he built the first telescope in human history.

Leveling instrument telescope components: lens tube, eyepiece, objective lens, cross reticle, focusing lens, focusing spiral, etc.

Total station function: Simply put, there are two functions, angle measurement and distance measurement. Everything else is derived from it.

The goniometric part is no different from the theodolite, and the ranging is to measure the slope between two points. With the included angle and oblique distance, the flat distance, height difference can be obtained by calculation, and then the coordinates can be obtained.

So the function of the total station is basically as follows: goniometry. Ranging. Coordinate measurement (data acquisition), coordinate lofting, edge measurement, overhang measurement, rear rendezvous, eccentricity measurement, area calculation, etc.

In addition, according to different instruments, there are: data communication, Bluetooth transmission, touch 9 screen, wince system (all functions of handheld computer), and even photography and other functions.

There are also measurement robots that have the ability to measure automatically.

There is a calculation formula for the scale in the telescope, which can roughly calculate the distance.

1. Select the object at the measured position as the ranging target, the target size is 20m, and the target is placed in the engraved line of the reticle, and the engraved line displays the reading 4

2. Rotate the slide rule in the direction of the objective lens, and align the reading 4 of the angle mark circle with the sharp corner on the object size indicator ring.

3. At this time, look at the engraved line corresponding to reading 20 (target size) and show 550, so that the distance between the target object and the ranging point is measured to be 550m.

The truck in the figure below is assumed to be 10 meters long, and the width occupied on the scale is 14 divisions, that is, 70 units (called dense position in military language), then divide 10 by 7, that is, 10 7, and then multiply it by 1000, and the measured distance is 143 meters. The prerequisite for using this type of ranging method is to have a good grasp of the dimensions and size of the target.

The telescope objective lens is a convex lens, and the object can be seen as infinity, so the object distance is much greater than the focal length, and it becomes a real image; The real image has nothing to do with whether there is a light screen or not, the light screen just accepts the real image and is convenient for people to observe; The function of the eyepiece is to facilitate eye observation, so that the real image formed by the objective lens is imaged through the eyepiece at the distance of the human eye, so it is a virtual image. Select A