Photography terminology. Refers to the viewfinder to see things like the location and scope of the lens material intake position as inconsistent with the scope of the phenomenon was due to the viewfinder and the lens caused by branches of two viewpoints. There are two ways Correction (1) to the viewfinder and the lens axis spindle at an angle; (2) changing the height of the viewfinder.
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shì chà
Direct observation with the naked eye when the error caused by
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No. 3
Parallax (parallax) Refers to the camera, the viewfinder and the lens taken to the scene of that box there are differences. Direction of the observer to see the difference of the same object in two different positions. For example, when you reach out a finger in front of the first closed right eye, left eye to see it; then closed his left eye, right eye to see it, you will find the position of the finger relative to the distant object has changed, and this is from Different point of view with little parallax. The distance (baseline) observed in two different positions by the available parallax between the opening angle of the celestial body is represented. Because people left and right eye spacing, there are subtle differences in perspective caused his eyes, and such differences were observed in the two eyes make the scene a little bit of displacement. Mankind has been able to produce a three-dimensional sense of space visual effects, is precisely this shift in medicine is called parallax, organic synthesis in the brain. An eye-opener, in fact, the result of the parallax effect. The same person in different eyes, the results do not look at things the same, different people's eyes, it is far from natural. When the "visual difference" appears between you and your partner, we might look at another angle, learn to convince yourself, learn to give up has seen. Then you will find: different opinions between you, there may be synthesized, and the synthesis of the results will make you enlightened, so that you eye-opener. To learn how to use angles, use of parallax. Do not forget: If you do not 3cm distance between the eyes, then you will never be able to enjoy the 3d!
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No. 4
Parallax (PARALLAX) Refers to the camera, the viewfinder and the lens taken to the scene of that box there are differences. Direction of the observer to see the difference of the same object in two different positions. For example, when you reach out a finger in front of the first closed right eye, left eye to see it; then closed his left eye, right eye to see it, you will find the position of the finger relative to the distant object has changed, and this is from Different point of view with little parallax. The distance (baseline) observed in two different positions by the available parallax between the opening angle of the celestial body is represented. Because people left and right eye spacing, there are subtle differences in perspective caused his eyes, and such differences were observed in the two eyes make the scene a little bit of displacement. Mankind has been able to produce a three-dimensional sense of space visual effects, is precisely this shift in medicine is called parallax, organic synthesis in the brain. An eye-opener, in fact, the result of the parallax effect. The same person in different eyes, the results do not look at things the same, different people's eyes, it is far from natural. When the "visual difference" appears between you and your partner, we might look at another angle, learn to convince yourself, learn to give up has seen. Then you will find: different opinions between you, there may be synthesized, and the synthesis of the results will make you enlightened, so that you eye-opener. To learn how to use angles, use of parallax. Do not forget: If you do not have 3CM distance between the eyes, then you will never be able to enjoy 3D! Surveying: ⑴ optical parallax adjustment process in the experiment, with the eye shake (the observation position slightly changed), relative movement between the scale and the object, causing a phenomenon difficult to accurately measure the experiment. ⑵ parallax reason: Because metric scale (reticle) and the object (like) are not coplanar, so that when the eye shaking (viewing position slightly changed), there will be between the ruler and the relative movement of the object. Parallax refers to the objective form you can see the object and the object has a certain gap. Astronomy: Parallax is a distance from the observation direction of the difference of two points generated by the same target. Look from the target angle between two points, called the disparity of these two points, the distance between two points is called the baseline. Just know that the parallax angle and baseline length, you can calculate the distance between the target and the observer. Eliminate parallax methods: If there is a parallax between the test image and the scale (reticle), indicating that the two are not coplanar, or the like should be slightly adjusted scale (reticle) position and the left and right or up and down slightly while shaking the head, the eyes do no matter how far away from the sights around, up and down, the line of sight it seems always will be fixed at the same point on the target, as measured with a ruler until between no relative movement, ie ignoring the poor. In the optical path of the spectrometer, for accurate positioning and measurement, and must cross the like silk or transferred to a reticle plane of the scale, i.e., as the elimination of parallax adjustment. For example, direct measurement of length with a ruler, feet and objects to be close in order to make accurate measurements and readings. High precision instrument, there is always some small distance between the pointer and its ruler, should be in position to face readings. Some mirrors installed on the dial, to guide the correct position of the viewpoint, eyes, hands, like the three-point line pointer, thereby reducing the disparity, so that reading is more accurate. When there is disparity, if eyes are not kept in a central location, aiming point may be biased. Physics: The train will instantly feel the earth rotates, because human vision has the resolution (0.17s) and image transform quickly, we will deal with the brain Pictures feel connected to it, the earth will instantly rotate (in this case the plains will feel when the train)
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Wikipedia Encyclopedia
shicha Parallax parallax The direction of the observer to see the difference of the same object in two different positions. Parallax can use distance (also known as the baseline) in two different positions between the observer to represent the opening angle of the celestial bodies. And celestial objects parallax distance between the observer exists a simple triangle. Measure the parallax of celestial bodies, we can determine the distance of celestial bodies. Accordingly, the parallax measuring celestial celestial most basic method is to determine the distance, known as the triangulation parallax. Since the distance is very distant celestial bodies, their disparity is small for accurate determination of their disparity, the baseline must be stretched as much as possible. In determining the parallax of some celestial bodies in the solar system, the Earth's radius as a baseline, on Sunday called the parallax measured parallax. In the determination of stellar parallax, the average distance between the Earth and the Sun as a baseline, the measured annual parallax is called parallax. Parallax Parallax is the Earth's rotation on Sunday or Sunday depending on the movement of celestial generated. It is defined as: the radius of the Earth by M points in the celestial S at the opening angle (Fig. 1 celestial Sun parallax). Diurnal parallax variation with altitude change objects. The day when the body is located at the zenith Z, it's Sunday parallax zero; day body located in peacetime, it's Sunday disparity reaches a maximum value P □, called Sunday horizontal parallax. Sunday Relations horizontal parallax P □ and geocentric distance to objects between D and R is the radius of the Earth can be expressed as: □. Known R and P □, you can obtain D. Considering the Earth is flat sphere, equatorial radius is larger than the polar radius, the same as the difference between the celestial horizon Sunday, with different observation locations will vary. When the observer is located in the equator, the celestial Sun has a maximum horizontal parallax, called the equatorial horizontal parallax. The easiest way to Sunday horizontal parallax measurement objects are: on the same meridian far apart two places at the same time observing the same object, determine its distance □ □ □ □ and transit in the days when the top two places, if known geographic latitude and were □ □ □ □, the available formulas □ P □ calculated value. 1751 ~ 1753, the French Rakai and Lalande, for the first time in almost in the same meridian Berlin Observatory and the Cape of Good Hope Observatory while observing the moon, quite accurately determine the horizontal parallax of the moon Sunday. Sunday planets horizontal parallax can be measured by the method described above when they are closest to the Earth. In 1672, the French GD Cassini is made according to his Guyanese law in Paris and South America Mars Observer, Sunday obtain the horizontal parallax of Mars. As the sun Sunday horizontal parallax can not directly measured by the method described above was determined (see solar parallax) indirect methods must be used. Annual parallax parallax motion of Earth around the sun anniversary generated. It is defined as: the distance between the Earth and the Sun at the inclination of the star. □ annual parallax of stars and the sun to the star's distance r to the relationship between the sun and Earth's average distance between □ (Figure 2 star's annual parallax) can be expressed as: □. □ annual parallax of stars are smaller than the corner of seconds, it is usually □ angular seconds, and the above equation is written as: □, known □ and □, can be obtained by r. Since moving carefully between the doctrine of Copernicus proposed date (see heliocentric system) after nearly three hundred years, many people attempt to find the annual parallax of stars, but without success, so that some people doubt the correctness of the Copernican theory attitude, including the famous Danish astronomer Tycho. Until 1837 ~ 1839, Russia В.Я. Struve, Bessel, Germany and the United Kingdom were measured T. Henderson was out of the Vega (ie Lyra □), 61 and Cygnus Alpha Centauri (ie Centaur □) three nearby stars annual parallax. Determined by visual stellar parallax early anniversary, accuracy is not high. Since the twentieth century, began to use large diameter, focal length of the large refracting or reflecting telescope and photographic method for determining parallax. When the star with the distance from Earth to 100 parsecs, the observation error is equivalent to its annual parallax parallax itself has equal value, so only the distance is less than 100 seconds to close the gap between the stars, they can be measured more accurately trigonometric parallax . Yale University Observatory lists about 6,000 trigonometric parallax of stars in 1952 published "stellar parallax total table". The past two or three decades and more than 10% of measured trigonometric parallax dark star. For example, in 1969 edition of "Gliese Star List", a list of 1,049 stars within 20 parsecs from the close of star parallax. Stellar throughout the day, the south gate of a companion two biggest disparity equal 0 □ 76, so it is called Proxima Centauri. Long-term solar parallax parallax is generated by the movement in space (also known as parallax motion). □ □ and solar parallax long the relationship (Figure 3 long-term parallax) r and the sun in a year traversed the distance d between the stellar distance can be expressed as: □. Far from stellar, □ □ very small, so when it arcsec timing: □. The sun room rate for nearby stars V □ = 19.7 km / sec, hence the term parallax of stars near the Sun is equal to 4.15 times its annual parallax. For a group of stars have some common characteristics, such as such as apparent magnitude or spectral type stars within a determined range, or some type of variable star observations can be used on its own or as the radial velocity data for statistical analysis, seeking the term of their parallax. (He Miaofu)