CN2305687Y - New prism fixing and adjusting device - Google Patents

Abstract

The utility model relates to a prism is fixed and adjusting device, especially indicates that telescope internal prism is fixed and adjusting device. It is mainly characterized by that two surfaces of a prism seat are respectively connected with upper and lower prisms, said prism seat is respectively connected on a three-lug on one plane in the mirror shell by means of three screws, between said prism seat and three-lug three compression springs are respectively set, and the prism seats beside three screws are respectively connected with three regulating screws, and the heads of said regulating screws are respectively supported on the surface of three-lug. Therefore, the assembly and disassembly are convenient, the angle adjusting range is wide, and the adjustment is easy.

Description

New prism fixing and adjusting device

The utility model relates to a prism fixing and adjusting structure, in particular to a prism fixing and adjusting device in a telescope.

At present, the fixed and adjustment structure of the known telescope inner prism is a fixed device. As shown in Figure 6, a prism 6 is respectively provided near the eyepiece 18 and near the objective lens 19, so that two mirrors 6 (porro prism prism) On the mirror seat (not shown) in the mirror housing 1, the prism 6 is connected to the mirror housing 1 with glue, because the prism 6 needs to adjust the angle of light incident and the angle of emission, that is, Adjust the optical axis so that the two optical axes are parallel to achieve the best use state.

In order to adjust the prism 6, the traditional way is to provide a 91 on the mirror housing next to each prism 6, and utilize a screw 90 to adjust the inclination angle of the prism 6, but the mirror housing 1 is usually a fairly thin structure, which can be set. There are only one or two teeth in the screw thread, and it is also very difficult to increase the screw hole 91. Therefore, the diameter and length of the screw 90 can only be very small, so that the prism cannot be adjusted for a large angle of error (that is, a larger Range adjustment), it is inconvenient to adjust and fix the optical axis and replace the prism.

In view of this, the purpose of this utility model is to provide a new type of prism fixing and adjusting device, which can be integrally fixed in the mirror housing, easy to adjust, and has a large adjustment angle range.

The purpose of this utility model is achieved in that a novel prism fixing and adjusting device includes a mirror housing, an upper prism and a lower prism, and is characterized in that three uniformly distributed lugs are arranged on a plane in the middle of the mirror housing, and on the opposite sides , and the vertical upper and lower prisms are provided with a prism seat, which is respectively connected to the surface of the three lugs with three screws, and between the prism seat and the three lugs are respectively provided with empty sleeves on the periphery of the screws. Three compression springs.

Above-mentioned prism seat is hooked with upper and lower prism with a U-shaped elastic hook respectively.

Due to the adoption of the above scheme: the loading and unloading is convenient, the adjustment angle range is large, and the adjustment is easy.

Below in conjunction with accompanying drawing and embodiment the utility model is further described.

Fig. 1 is a schematic front view of a typical embodiment of the utility model.

Fig. 2 is a front view diagram of a mirror housing of a typical embodiment of the utility model.

Fig. 3 is a three-dimensional exploded view of a typical embodiment of the utility model.

Fig. 4 is a schematic cross-sectional view of 4-4 in Fig. 1 of a typical embodiment of the utility model.

Fig. 5 is a schematic cross-sectional view of 5-5 in Fig. 1 of a typical embodiment of the utility model.

Fig. 6 is a three-dimensional exploded view of a known structure.

Present embodiment, as shown in Figures 1-5, (only shows the structure of telescope right half side mirror housing 1 among the figure, but left half side mirror housing 1 is symmetrical with it, and complete and identical), mirror housing 1 inner surface middle part is on a plane There are three protruding lugs 2, 3 and 4 (with an interval of about 120°), which are evenly distributed in the mirror housing 1; the outer edge of the prism base 5 is slidingly fitted with the inner wall of the mirror housing 1, and is connected to the protrusions 2 and 3 with one end surface. And the end face of 4, three garden holes 51, 52 and 53 are set in this prism seat 5.

A pair of prisms 61,62 (triangular porro prisms, porro prism) are connected to the two end faces 5a, 5b of the prism seat 5 with opposite sides and orthogonally respectively, that is, the upper prism 61 is connected to the outer position of the upper end face of the prism seat 5, Cover circular holes 52,53, the sharp angle of prism 61 is towards eyepiece, but, not concentric with eyepiece: on the contrary, lower prism 62 is connected in the inner side position of the lower end surface of prism seat 5, covers circular hole 52,53, prism 62 The sharp angle is towards the objective lens, but not concentric with the objective lens; make the upper prism 61 and the upper prism 62 be in the opposite right angle intersection state at the circular hole 52, and the upper prism 61 does not contact with the lower prism 62, and the upper and lower prisms 61 , 62 are bonded on the prism seat 5 with glue respectively, and also borrow a U-shaped elastic hook 7 to straddle the prism respectively, hang on the edge of the prism frame with two lower ends, play a strengthening connection effect.

The combination of the prism base 5 and the mirror housing 1 is as shown in Figure 5. At the positions where the prism base 5 aligns with the lugs 2, 3 and 4, a screw 81 passes through the perforations 54, 55 and 56 on the prism base 5 respectively. Be connected to the screw holes 21, 32 and 41 of the lugs 2, 3 and 4 on the mirror case 1, and a compression spring 84 is placed on the periphery of the screw 81, that is, each spring 84 is respectively located on the lugs 2, 3 and 4. 4 and the corresponding position on the lower surface of the prism seat 5, in addition, the head of each screw 81 also establishes an elastic washer 83 (wavy square or split washer); meanwhile, an adjusting screw 82 is also established respectively next to each screw 81, The adjustment screws 82 are respectively screwed in the screw holes 57, 58 and 59 on the prism base 5, and are pushed against the surfaces of the lugs 2, 3 and 4 respectively to change the inclination of the prism base 5 by screwing the three adjustment screws 82. Angle so that the incident rays emerge parallel to each other.

To sum up: the utility model utilizes the prism base to connect with the protruding ear in the mirror housing, and utilizes the adjusting screw of the prism base to extend to the surface of the protruding ear. When the adjusting screw 82 is screwed, the compression spring 84 under the side screw 81 Compressed or stretched, adjust the inclination of the prism seat, thereby adjusting the angle of the optical axis, that is, the prism seat can be adjusted within the deformation range of the compression spring 84.

In addition, a pair of prisms have been fixed on the prism base, and can move with the prism base as a whole, can be disassembled and installed as a whole, the optical axis can be adjusted in a wide range, and the screw adjustment is also very convenient.

Claims (2)

1. A new type of prism fixing and adjusting device includes a mirror case (1), an upper prism (61) and a lower prism (62), which is characterized in that three evenly distributed lugs are arranged on a plane in the middle of the mirror case (1) (2), (3) and (4), be provided with a prism seat (5) between opposite, and perpendicular upper and lower prisms (61), (62), this prism seat (5) is provided with three screws (81) is respectively connected on the surface of three lugs (2), (3) and (4), and is respectively provided with between prism base (5) and three lugs (2), (3) and (4). Empty cover three compression springs (84) on screw (81) periphery. 2. The novel prism fixing and adjusting device according to claim 1, characterized in that: the above-mentioned prism seat (5) is connected with the upper and lower prisms (61) and (62) respectively by a U-shaped elastic hook (7) .

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