CN207850656U

CN207850656U - Target generator with combination graticle

Info

Publication number: CN207850656U
Application number: CN201820198705.2U
Authority: CN
Inventors: 高丰; 向阳; 李琦; 宁旭; 李京蔓
Original assignee: Changchun University of Science and Technology
Current assignee: Changchun University of Science and Technology
Priority date: 2018-02-01
Filing date: 2018-02-01
Publication date: 2018-09-11
Anticipated expiration: 2028-02-01

Abstract

Target generator with combination graticle belongs to optical instrument and optical system parameter determination techniques field.The prior art unavoidably will produce alignment error, bias and inclination during diopter adjustment.In the target generator with combination graticle of the utility model, light source, frosted glass, object lens sequentially coaxially arrange, it is characterized in that, combination graticle is fixed on the optical axis between frosted glass and object lens, the combination graticle is made of multiple graticle arranged in co-axial alignment, each graticle is located at the different object distances x of object lens, and object distance x is by formulaIt determines, in formula：X is the object distance of object lens, and f' is the image space focal length of object lens, and x' is the image distance of object lens.One target generator can provide multiple targets for the adjustment of optical instrument.

Description

Target generator with combination graticle

Technical field

The utility model is related to a kind of target generators with combination graticle, and a target generator can be optics The adjustment of instrument provides multiple targets, belongs to optical instrument and optical system parameter determination techniques field.

Background technology

Optical target generator is used for generating the light of various states Dress tunes up the important tool of whole optical instrument.Journey i.e. optical system parameter such as focal length, most is had suffered in the dress tune-up of optical instrument The measurement process of small resolution angle etc., it is exactly to use that this, which just needs target imaging of the optical system to limited distance, target generator, Meet this needs, and need to adjust transformation target range by diopter, multiple targets are provided.Diopter adjustment be exactly Axis adjusts the position of the object lens or graticle in target generator upwardly through the mobile retracting cylinder equipped with graticle, when point Reticle plate can image in infinity when focal plane of lens, can be imaged at limited distance when leaving focal plane.Adjust graticle Position unavoidably will produce alignment error, bias and inclination.Graticle is not smart in axial position after alignment error illustrates adjustment Really, according to formulaTo be at 100m for imaging, if graticle alignment error Δ x is in image distance x' 0.1mm, then image error Δ x' is up to 0.625mm.Bias illustrates that graticle and the coaxial degree of object lens, light source reduce, According to eccentricity equations To be at 100m for imaging, if (the i.e. graticle centers graticle bias Δ y in image distance x' With optical axis distance) it is 0.01mm, it will cause to be imaged eccentric C (i.e. inconocenter is at a distance from optical axis) 1.81mm.Inclination illustrates graduation The vertical extent of plate and optical axis reduces, according to slope formulaIn formula：Δ T' is as angle of inclination, Δ T is object angle of inclination, i.e. graticle angle of inclination, and unit is milliradian, and D is graticle bore, and x is object distance, and f' is image space Focal length, for image distance x' is to be imaged at 100m, if graticle angle of inclination Δ T is 0.17 milliradian, will cause as inclining Rake angle is 1770 milliradians.As it can be seen that using target generator adjustment optical instrument during, the alignment error, partially The heart and inclination can make the measurement of optical system characteristics parameter generate large error.

Utility model content

The utility model avoids producing it is intended that under the premise of realizing that same target generator provides multiple targets Alignment error, bias and the inclination of raw graticle, we have invented a kind of target generators with combination graticle thus.

In the target generator with combination graticle of the utility model, light source 1, frosted glass 2, object lens 3 are same successively Axis arranges, which is characterized in that as shown in Figure 1, combination graticle 4 is fixed on the optical axis between frosted glass 2 and object lens 3, it is described Combination graticle 4 is made of 5 arranged in co-axial alignment of multiple graticles, and as shown in Figure 2 and Figure 3, each graticle 5 is located at the difference of object lens 3 At object distance x, object distance x is by formulaIt determines, in formula：X is the object distance of object lens 3, and f' is the image space focal length of object lens 3, and x' is object The image distance of mirror 3.

The utility model its have technical effect that, due in target generator have combination graticle 4, combine graticle 4 Position is fixed, meanwhile, it includes multiple graticles 5 to combine in graticle 4, such as 5, and these graticles 5 are located at object lens 3 not At object distance x, then, at each corresponding image distance x' of 3 image space of object lens, at infinity, 120m, 80m, 50m and 30m, energy Multiple graticle pictures are accessed, as shown in figure 4, providing multiple targets for tune optical instrument to be installed, also, either combine graduation Each graticle 5 in plate 4, or combination graticle 4, it is all fixed, therefore, have no way of generating adjustment of the existing technology Error problem, and eccentric and tilt problem can also keep under strict control during the original equipment of target generator, such as graticle bias Δ y It can control within 0.005mm.

Description of the drawings

Fig. 1 is the target generator overall structure diagram with combination graticle of the utility model.Fig. 2, Fig. 3 are this Combination graduation plate structure schematic diagram in the target generator with combination graticle of utility model；Wherein, the group of Fig. 2 signals Close graticle formed by multiple non-uniform thickness graticle gluings, Fig. 2 simultaneously be used as Figure of abstract, Fig. 3 signal combination graticle by It is constituted each other by multiple uniform thickness graticles that locating ring separates and positions.Fig. 4 is to have combination point by the utility model Draw that multiple image distances that the target generator of plate generates are different, the graticle with angled graduation is as schematic diagram.

Specific implementation mode

In the target generator with combination graticle of the utility model, light source 1, frosted glass 2, object lens 3 are same successively Axis arranges, as shown in Figure 1.Combination graticle 4 is fixed on the optical axis between frosted glass 2 and object lens 3, the combination graticle 4 It is made of 5 arranged in co-axial alignment of multiple graticles, as shown in Figure 2 and Figure 3, each graticle 5 is located at the different object distances x of object lens 3, object Away from x by formulaIt determines, in formula：X is the object distance of object lens 3, and f' is the image space focal length of object lens 3, and x' is the image distance of object lens 3.

There are two types of the structures of the combination graticle 4, when combination graticle 4 it is glued by multiple non-uniform thickness graticles 5 and At as shown in Fig. 2, the dividing plane 6 of each graticle 5 is located at object distanceLocate, by graticle 5 between adjacent dividing plane 6 Plate body 7 separates and positions；Second is that combination graticle 4 is by each other by locating ring 8 separates and positions multiple uniform thickness graticles 5 It constitutes, as shown in figure 3, the dividing plane 6 of each graticle 5 is located at object distancePlace.

If 3 focal length f of object lens is 550mm, to be respectively that infinity, 120m, 80m, 50m, 30m are obtained in image distance x' right-to-lefts 5 targets are obtained, the graticle 5 of 5 uniform thickness are taken, by object distance formula5 object distance x values are calculated, arrange 5 uniform thickness accordingly Graticle 5, and separated and positioned by 4 locating rings 8 of different size, wherein with image distance x' be the corresponding object distance x in infinity It is zero, the dividing plane 6 of the graticle 5 at this is physically located at the object focus of object lens 3.

Claims

1. a kind of target generator with combination graticle, light source (1), frosted glass (2), object lens (3) sequentially coaxially arrange, It is characterized in that, combination graticle (4) is fixed on the optical axis between frosted glass (2) and object lens (3), the combination graticle (4) It is made of multiple graticles (5) arranged in co-axial alignment, each graticle (5) is located at the different object distances x of object lens (3), and object distance x is by formulaIt determines, in formula：X is the object distance of object lens (3), and f' is the image space focal length of object lens (3), and x' is the image distance of object lens (3).

2. the target generator with combination graticle according to claim 1, which is characterized in that the combination graticle (4) it is formed by multiple non-uniform thickness graticle (5) gluings, the dividing plane (6) of each graticle (5) is located at object distancePlace, formula In：X is the object distance of object lens (3), and f' is the image space focal length of object lens (3), and x' is the image distance of object lens (3), between adjacent dividing plane (6) Separated and positioned by the plate body (7) of graticle (5).

3. the target generator with combination graticle according to claim 1, which is characterized in that the combination graticle (4) by being separated each other by locating ring (8) and multiple uniform thickness graticles (5) for positioning are constituted, the graduation of each graticle (5) Face (6) is located at object distanceLocate, in formula：X is the object distance of object lens (3), and f' is the image space focal length of object lens (3), and x' is object lens (3) image distance.