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 Wysłany: Pon 3:16, 13 Gru 2010 Temat postu: ugg italia Since the collimator adjustment _2889 i |
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Since the collimator adjustment indication error
Logo displacement partition board, and asked then be regarded as mirror angle,[link widoczny dla zalogowanych], so as to achieve the purpose of measuring small angle. 2 shows the values of tolerance because although the model from a variety of collimator, various types of optical instruments and optical components layout parameters are different, but the basic measurement principle is the same. Mainly in the following box autocollimator as an example of tolerance indication of the instrument to analyze the reasons. 1995-04-25 Received '27-year-old assistant head capsule Reader Service Card No. 112 Factory f, wide, c, air measurement technology from the 1996, Volume 16 (2) shows a display of values from the collimator The main factor is the change in lens focal length, the measured error and micro-optics system, the position change of the lens from the collimator only generally composed of a number of lenses, lens distance changes, will affect the objective lens has a focal length of the blame between the lens the whole ring positioning, is fixed for each lens was relatively strong, the objective focal length in use will not change the general system error increases micrometer was mainly due to the wear test due to micro-components. Structure for the micrometer screw assembly, the main is the micrometer screw wear. Optical element position change to the impact of instrument is more complex, different situations have to do a detailed analysis based on self-measurement principle of the collimator,[link widoczny dla zalogowanych], the measured differential cross line reticle and the reticle should be in the objective lens focal plane If the measured differential on the reticle or cross line reticle departure from the focal plane, it will bring indication error. Figure 3. Differential measurement in the focal plane reticle, the reticle and the Z11 crosshairs of a BU, \, \ ~:=,, \ Figure 3 Differential reticle position measurement caused by the change-tolerance l indication of a mirror; 2 of a lens; 3 of a focal plane; 4 a differential measurement in the focal plane reticle remains at this time, although the cross-line division of the target board is still in the objective lens focal plane imaging, and image point displacement in the focal plane, 2 - is still equal to 2fo, but it is in determining the differential displacement of the board designated as' obviously ≠. Therefore, bringing indication error. If the cross-line reticle position to change, and differential measurement reticle objective lens focal plane is still in. The cross line reticle focal plane deviation from the small, non-parallel beams of light emitted. So. Reflected by the mirror, the cross line of division will become the ultimate goal of the board as in the focal plane and outside it in the focal plane of a test on the reticle formed differential parallax. Therefore, a display will affect the value of the instrument error. For the cassette from the collimator, the optical path in the mirror with a D 2 to produce the small folded light path. This way if the light reflector 2 to change the location, will also have a display error. Figure 4 is HYQ Self collimator optical system. If large and small mirror mirror asking distance increases, a large mirror set I moved to the position from position I, as shown in Figure 5, which will mirror light 2 by taking the distance between the variable optical path freshman India With the objective to increase the focus forward,[link widoczny dla zalogowanych], moved from the position F F # 'position. The objective of the division between the board and the distance the same. Therefore, the resulting reticle off the map 4HYQ Self】 collimator optical system of a light source; 2 of a filter; 3 a crosshair reticle I4 Ij a cubic prism of a small mirror mirror 6} 7 a big one objective; 8 a stem I figure the amount of mirror l9 reticle; lo a differential measurement reticle eyepiece Figure 5 l1 of a large and small effects of changes in mirror position of a lens l2 l a small mirror; 3 - micrometer (cross lines) 4 reticle in the focal plane of a large mirror after this time,[link widoczny dla zalogowanych], the measured differential cross line reticle and reticle are not in the objective lens focal plane, so it causes the small apparatus to demonstrate the value of tolerance Conversely, if large mirror and small distance between the mirrors will reduce the focal plane of a setback, measured differential cross line reticle and reticle in the focal plane will also result in tolerance indication instrument. Based on the above 3 points off adjustment method, for different causes of apparatus to demonstrate the value of tolerance should be taken to a different tune repair measures. The use of instruments,[link widoczny dla zalogowanych], lens focal length change of the situation is rarely seen. Check and adjust it can be carried out in the universal optical bench. Wear and tear caused by the micrometer screw over the poor condition indication is not common. And its repair methods are relatively simple grinding of a micrometer screw, or simply replace a micrometer screw to a new address will not go into. In use since the collimator, resulting in tolerance indication is a common cause of change in the location of the optical components from the collimator for the cassette, mainly large and small changes in position between the mirrors. It may help adjustment to the collimator. Large and small mirrors the whole blame should be combined with cross line reticle adjustments to be. First observed in the instrument field of parallel lines of light like a cross past. Niu fruit large and small mirrors to change position, then the collimator will not cross lines, as measured with the instrument panel as well as clear differentiation program. Adjustment opened the instrument (the switch to 41 million)
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