CN209459868U - A kind of more optical axis progressive multi-focus lens focal power measuring devices - Google Patents

Abstract

The utility model relates to a kind of more optical axis progressive multi-focus lens focal power measuring devices, including light source, collimation lens, microscope base and optical receiver, the microscope base is mainly made of XY mobile station and pivot angle platform, the XY mobile station includes workbench and the X being arranged on workbench side to driving mechanism and Y-direction driving mechanism, pivot angle platform is set on the workbench, the pivot angle platform includes pivot angle pedestal and is arranged in pivot angle pedestal and can be used to install the eyeglass support of eyeglass to be measured along the rotary shaft that pivot angle pedestal wall moves up and down, the rotation axis connection.The utility model has the advantages that being fixed on eyeglass on the microscope base being made of an XY mobile station and a pivot angle platform, it may be implemented to be scanned eyeglass the measurement of formula focal power by control mobile station and deflection angle, it can measure on eyeglass arbitrarily not with the focal power under the optical axis, help to solve the defects of current vertometer measurement and deficiency.

Description

A kind of more optical axis progressive multi-focus lens focal power measuring devices

Technical field

The utility model relates to a kind of more optical axis progressive multi-focus lens focal power measuring devices, belong to lens power measurement skill Art field.

Background technique

With the high speed development of information-intensive society, the information of the mankind 80% is obtained by eyes, and good eyesight is to people to Guan Chong It wants.According to statistics, 50% people needs vision correction, and the means of most common auxiliary vision correction are exactly to wear glasses.According to tune It looks into, as myopia and the problems such as presbyopic are increasingly severe, for teenager and mid-aged population, it is accordingly required in particular to which a pair of glasses was both It is able to satisfy far and near actual use demand, while during eyeglass is worn, and does not have visual impact, influences to wear effect. Therefore, multifocal progressive lenses there have been.1956 road Nian Yishi companies are proposed first generation progressive multi-focus lens (progressive addition lenses, abbreviation PAL), focal power is gradually increased from the top of eyeglass to lower part.Due to What the focal length of the eyeglass of progressive additional may be implemented to gradually change, this is just the myopia and astigmatism for solving the problems, such as the elderly, with And slows down teen-age myopia problem and provide very effective solution.From traditional myopia, long sight routine eyeglass, to now The free surface lens such as Bifocal lenses, multifocal lens, progressive multi-focus lens, aspherical lens and prevention and control eyeglass, can Meaning is maked rapid progress.

Manufacture and test match during, vertometer be to lens angle measurement important tool.Vertometer is also referred to as refractive power Meter and eyeglass estimate instrument, are mainly used for the measurement of spectacle lens optical parameter, are the important optical testing instruments of optometry.Vertometer The measurement in vertex refractive power and optical centre and cylinder eyeglass refractive power and axle position direction and eyeglass rib after main measurement eyeglass The measurement in mirror and its substrate direction.Lens quality and quality with mirror directly affect the vision health with mirror person, and vertometer is mirror Piece production and the indispensable state compulsion gauge check instrument with spectroscopy are the quality assurances that eyeglass production and consumption person matches mirror, Traditional vertometer design and use be for single focus eyeglass, when measurement, optical path vertical incidence to eyeglass apex angle Place.When using traditional goniometer measurement multifocal or progressive focus lens, often by the dynamic searching tested point of manpower, or The region measurement good to mark in eyeglass production process.Obviously, the program can no longer meet multifocal progressive lenses Measurement.At the same time, angle is worn from human eye, since glasses can rotate, according to the reversible feature of light, practical human eye exists The phenomenon that more optical axis are presented when observing external object, and the vertical eyeglass top focus of traditional vertometer optical path is incident, the optical axis It is unique and and the case where do not meet human eye actual wear, measured result has certain error.During actually getting the right lensses for one's eyeglasses It is whether comfortably the measurement error is inhibited to add and subtract eyeglass degree by feeling for wearer.Above-mentioned judgment basis is complete It is subjectivity entirely, varies with each individual.Thus, with lens design and processing technology be constantly progressive and perfect, the measurement of eyeglass Technology also develops constantly.

Between the distance light area and the area Jin Yongguang of progressive multi-focus lens, with the variation pattern that diopter is incremental, from remote Gradually arrived with degree closely with degree by the area Yuan Yongguang it is organically connected with the area Jin Yongguang together with, therefore can be same on an eyeglass Shi Yongyou see long distance, in different luminosity needed for equidistant and low coverage.Meanwhile it being presented when human eye actual wear glasses observation object more Optical axis phenomenon.The measurement scheme of commercialization vertometer uses at present single focus and the fixed optical axis, can no longer meet progressive more The test and optometry demand of focus lens.Therefore, it researches and develops one kind and had not only been capable of measuring the focal power of progressive multi-focus lens, but also be capable of measuring people The method of lens power is particularly important under eye actual wear effect.

Utility model content

It is progressive to provide a kind of more optical axis for the shortcomings that technical problem to be solved in the utility model is, overcomes the prior art Multifocal lens focal power measuring device is not only suitable for common eyeglass and is capable of measuring more optical axis progressive multi-focus lens again in different zones Optical parameter.

In order to solve the above technical problems, more optical axis progressive multi-focus lens focal power measurement dresses provided by the utility model It sets, including light source, collimation lens, microscope base and optical receiver, the microscope base is mainly made of XY mobile station and pivot angle platform, the XY Mobile station includes workbench and the X being arranged on workbench side to driving mechanism and Y-direction driving mechanism, in the workbench Upper setting pivot angle platform, the pivot angle platform include pivot angle pedestal and are arranged in pivot angle pedestal and can move up and down along pivot angle pedestal wall Rotary shaft, the rotation axis connection is used to install the eyeglass support of eyeglass to be measured.

The utility model provides a kind of using the more optical axis progressive multi-focus lens different zones Optical Parametrics of above method measurement Several vertometers, can actual measurement human eye practical optical parameter of glasses itself during wearing eyeglass, such as focal power.Due to Progressive multi-focus lens need to measure the focal power of different location, if manually adjusting lens position cannot be guaranteed that institute's measuring point uniformly divides Cloth, the utility model pass through stepper motor mobile work platform and pivot angle platform by installing three stepper motors in the lower part of microscope base Come change light intake eyeglass position, this just can measure the focal power of difference on equally distributed eyeglass, to guarantee progressive The variation of multifocal lens focal power is reasonable.

In short, the utility model has the characteristics that following two: first is that the angular of arbitrary point on eyeglass can be measured, Second is that can measure the angular of eyeglass in the case of the different optical axis.

Preferably, the first straight line sliding rail that the X includes X-direction stepper motor to driving mechanism and extends in X direction, institute It states first straight line sliding rail to match with a transverse sides of workbench, the workbench passes through the first actuator and X-direction stepping Motor is connected.

Preferably, the Y-direction driving mechanism includes Y-direction stepper motor and the second straight line sliding rail along Y-direction extension, institute It states second straight line sliding rail to match with a longitudinal side of workbench, the workbench passes through the second actuator and Y-direction stepping Motor is connected.

In above structure, X, Y-direction stepper motor can drive scanning table to move in the horizontal direction, to drive setting Pivot angle platform on scanning table moves horizontally.

Preferably, the X-direction stepper motor is controlled by control line with the X-direction that first straight line sliding rail one end is arranged in Button connection, the Y-direction stepper motor are connected by control line with the Y-direction control button that second straight line sliding rail one end is arranged in It connects.

Preferably, the pivot angle pedestal is made of two column symmetrically arranged on the left and the right, and a rotation is connected between two columns Axis.

Preferably, the inside of the column has vertically extending strip axis hole, and the both ends of the rotary shaft are inserted respectively Enter into strip axis hole, middle part is equipped with eyeglass support, and the rotary shaft is connected by actuator with Z-direction stepper motor.

In above structure, Z-direction stepper motor driving rotary shaft moves in the vertical direction, to drive eyeglass support perpendicular The upward micro angle swinging of histogram.

Eyeglass can be made to realize four direction movement up and down and inclination angle by adjusting tri- variables of X, Y, R in this way Variation, to change the position that light emission enters eyeglass.

Preferably, the eyeglass support is an oblate cylinder, and the top of the oblate cylinder is equipped with for placing mirror to be measured The cavity of piece is equipped with the fixation bracket for clamping eyeglass to be measured in the top of the cavity.

Preferably, the bottom of the cavity has first through hole up and down, and it is logical to correspond to first on the workbench There is the second through-hole up and down at hole, be provided with optical receiver below the workbench.

Preferably, the first through hole, the size for being dimensioned slightly smaller than eyeglass to be measured of the second through-hole.

Preferably, the optical receiver is CMOS(Complementary Metal Oxide Semiconductor, mutually Mend metal-oxide semiconductor (MOS)).

The beneficial effects of the utility model are: eyeglass to be fixed on to the mirror being made of an XY mobile station and a pivot angle platform On seat, it may be implemented to be scanned eyeglass the measurement of formula focal power by control mobile station and deflection angle, measurable eyeglass is taken up an official post Meaning helps to solve the defects of current vertometer measurement and deficiency not with the focal power under the optical axis.

Detailed description of the invention

The utility model is further described with reference to the accompanying drawing.

Fig. 1 is more optical axis progressive multi-focus lens focal power measuring device schematic diagrams in the utility model.

Fig. 2 is the schematic diagram for forming hot spot in the utility model on CMOS.

Fig. 3 is the top view of XY mobile station and pivot angle platform in the utility model.

Fig. 4 is the top view of XY mobile station and pivot angle platform after placing eyeglass in the utility model.

Fig. 5 is the side view of XY mobile station and pivot angle platform after placing eyeglass in the utility model.

Fig. 6 is measuring principle figure of the focus on optical axis in the utility model.

Fig. 7 is the measuring principle figure in the utility model during eyeglass actual wear.

In figure: 1. light sources, 2. collimation lenses, 3. eyeglasses to be measured, 4. microscope bases, 5.CMOS, 6. scanning tables, 7. columns, 8.X is to driving mechanism, 9. Y-direction driving mechanisms, 10. rotary shafts, 11.Y direction controlling button, 12.X direction controlling button, and 13. Light beam, 14. first parallel rays, 15. second parallel rays, 16. refracted lights, 17. large spots, 18. small light spots, 19. is incident Light, 20. theoretical refraction light, 21. practical refraction light, 22. directional lights, 23. first refractive light, 24. first refractive light are reversed Extended line, 25. oblique incidence light, 26. second refraction light, 27. second refracted light reverse extending lines.

Specific embodiment

Embodiment 1

A kind of more optical axis progressive multi-focus lens focal power measuring devices provided in this embodiment, structure such as Fig. 1, Fig. 3, figure It successively include light source 1, collimation lens 2, microscope base 4 and CMOS5, microscope base 4 mainly by being sequentially arranged from bottom to up shown in 4 and Fig. 5 Firm banking, XY mobile station and pivot angle platform are constituted, and are provided with CMOS 5 on the fixed base, XY mobile station includes scanning table The 6 and X that is arranged on 6 side of scanning table is arranged on scanning table 6 to driving mechanism 8 and Y-direction driving mechanism 9 Pivot angle platform, pivot angle platform include pivot angle pedestal and are arranged in pivot angle pedestal and can be along the rotary shaft that pivot angle pedestal wall moves up and down 10, rotary shaft 10 connects the eyeglass support for installing eyeglass 3 to be measured.

Wherein, the first straight line sliding rail that X includes X-direction stepper motor to driving mechanism 8 and extends in X direction, first is straight First sliding groove is formed on the inside of line sliding rail, first sliding groove is matched with a transverse sides of scanning table 6, scanning table 6 It is connected by the first actuator with X-direction stepper motor, X-direction stepper motor is by control line and is arranged in first straight line sliding rail The X-direction control button 12 of one end connects.Y-direction driving mechanism 9 includes Y-direction stepper motor and extends along Y-direction second straight Line sliding rail, is formed with second sliding slot on the inside of second straight line sliding rail, and a longitudinal side of second sliding slot and scanning table 6 matches It closes, scanning table 6 is connected by the second actuator with Y-direction stepper motor, and Y-direction stepper motor passes through control line and setting Y-direction control button 11 in second straight line sliding rail one end connects.

Pivot angle pedestal is made of two column 7 symmetrically arranged on the left and the right, and column 7 is vertically arranged on scanning table 6, and two is vertical A rotary shaft 10 is connected between column 7.Specifically, the inside of column 7 has vertically extending strip axis hole, rotary shaft 10 Both ends are inserted respectively into strip axis hole, and the middle part of rotary shaft 10 is equipped with eyeglass support, and rotary shaft 10 passes through actuator and the side Z It is connected to stepper motor.Eyeglass support is an oblate cylinder, and the top of oblate cylinder is equipped with the cavity for placing eyeglass to be measured, It is equipped with the fixation bracket for clamping eyeglass 3 to be measured in the top of cavity, the bottom of cavity has first through hole up and down, The second through-hole having at first through hole up and down, the size of first through hole, the second through-hole are corresponded on institute's scanning table 6 It is slightly less than the size of eyeglass 3 to be measured, the lower section of scanning table 6 is provided with CMOS 5.

Present embodiments provide a kind of more optical axis progressive multi-focus lens focal power measurement methods, comprising the following steps:

The first step establishes more optical axis progressive multi-focus lens different zones measuring devices, as shown in Figure 1, using magnifying glass Inverse light path principle carries out focal power measurement, from top to bottom successively includes light source 1, collimation lens (magnifying glass) 2, eyeglass to be measured 3, microscope base 4 and CMOS 5, microscope base 4 are mainly made of XY mobile station and pivot angle platform, and XY mobile station includes the rectangular work being connected with stepper motor Make platform 6 and the X that is arranged on 6 side of scanning table is to driving mechanism 8 and Y-direction driving mechanism 9, on scanning table 6 Pivot angle platform is set, and pivot angle platform includes two root posts 7 and two rotary shafts that can be moved up and down on column 7 and along column 7 are arranged in 10, rotary shaft 10 connects the eyeglass support for installing eyeglass 3 to be measured.

3 concave surface of eyeglass to be measured is placed on eyeglass support by second step downward, and the light beam 13 that light source 1 issues is by collimation The focusing light effect of lens (magnifying glass) 2, is converted into directional light, when no eyeglass 3 to be measured is placed, the transformation of the first parallel rays 14 For the second parallel rays 15, and large spot 17 is formed directly on CMOS 5；When there is eyeglass 3 to be measured to be placed on microscope base 4, the One parallel rays 14 vertically injects eyeglass 3 to be measured, generates refracted light 16, and forms small light spot 18(on CMOS 5 and see figure 2).When eyeglass 3 rotates, the refractive direction of refracted light 16 also changes, and falls in the small light spot 18 above CMOS 5 Position also changed.

Third step adjusts microscope base mobile station by two XY stepper motors, and with movement eyeglass 3 to be measured, it is parallel to change first Light 14 injects the position of eyeglass 3 to be measured, to generate lesser measurement position variation, and then measures the angle of multifocal lens Degree.

Meanwhile changing the angle of eyeglass 3 and microscope base 4 to be measured by pivot angle platform, make to find and meet human eye and glasses With the angle of the glasses and microscope base 4 that require in the process.

When the center on CMOS 5 is deviateed in the center of circle of small light spot 18, illustrate that the focus of eyeglass 3 to be measured deviates main shaft, It does not need to readjust 3 position of eyeglass to be measured at this time, and the XY being connected with the direction XY stepper motor can be adjusted according to facula position Mobile station, to change the position that light injects eyeglass 3 to be measured.

4th step, when 3 slant setting of eyeglass to be measured is on eyeglass support, and its convex surface is upward, using fixed bracket pressure Firmly eyeglass 3 to be measured, the light beam 13 that light source 1 issues at this time pass through collimation lens 2, are converted into the first parallel rays 14, inject to be measured It is reached on CMOS 5 after eyeglass 3, forms small light spot 18.When the center of circle of small light spot 18 is just at center's point of screen position, explanation The focus of eyeglass 3 to be measured just on optical axis, by formula calculate the theoretical focal length of eyeglass 3 to be measured is, to be measured The real focal length of eyeglass 3 is ().Due to focal power D=1/f,, lThe distance of eyeglass 3 to be measured is arrived for CMOS 5,For incident light center to main shaft (eyeglass The axis of center is main shaft) distance,Master is projected on CMOS 5 after eyeglass 3 to be measured for theoretically incident light The distance of axis,For the distance that projects to main shaft of the practical incident light after eyeglass 3 to be measured on CMOS 5, L=.Ifl =10mm,The physical size of each pixel of=4mm, CMOS 5 is 4 μm of 4 μ m, then the real focal length of eyeglass to be measured is44 μm of μ ms, and assume error for a pixel (single direction, X or Y-direction) thenD, 1D=100 Degree, i.e. 0.01D=1 degree.

It, can be by not changing by adjusting the XY mobile station being connected with stepper motor when measurement for gradual change focus lens 3 position of eyeglass to be measured, is transmitted to light on CMOS 5 from the different location of eyeglass 3 to be measured, passes through hot spot side on viewing screen The distance in edge to the screen center of circle can find eyeglass highest degree position, can look for without manually adjusting lens position The position of eyeglass topnotch number out.

When measuring the degree of eyeglass, measuring principle of the focus on optical axis is as shown in fig. 6, variable includes: incidence The distance of light 19 its center to main shaft is, theoretical refraction light 20 after lens on CMOS 5 project to main shaft away from From for, the distance for projecting to main shaft of practical refraction light 21 after lens on CMOS 5 be, CMOS 5 arrive lens Distance bel, lens theory/design focal length be,, the practical focus for reflecting light 21, formula can be passed throughCalculate surveyed eyeglass degree.

Before this by the distance at 19 center of known quantity incident light to main shaft, theoretical refraction light 20 after lens in CMOS The distance for projecting to main shaft on 5, the distance for projecting to main shaft of practical refraction light 21 after lens on CMOS 5The distance of lens is arrived with CMOS 5l, acquire theory/design focal length of lens, practical refraction light 21 focus, focal power ForInverse, the degree of eyeglass is 100 times of focal power.

Followed by error analysis: if l=10mm,The physical size of each pixel of=4mm, CMOS 5 is 4 μ ms 4 μm, and assume error for a pixel (single direction, X or Y-direction) thenD, 1D=100 degree, i.e. 0.01D=1 degree.

5th step, as shown in fig. 7, eyeglass is that certain angle can occur for concavees lens and eyeglass during eyeglass actual wear Deflection generates first refractive light 23 after the incident eyeglass of directional light 22, and hot spot falls in formation point C, first refractive on CMOS 5 The reverse extending line 24 and horizontal axis of light 23 meet at point O.First refractive light 23 is vertically to inject postrotational concavees lens, is inclined Oblique incident ray 25 generates the second refracted light 26, the second refracted light reverse extending line 27 and main shaft after reflecting through eyeglass The distance for meeting at point F, EF is exactly focal length。

The distance that projects to main shaft of the theory refraction light 20 after lens on CMOS 5, which can be according to image Processing obtains.First according to the focal power measurement range of the vertometer of national regulations, it is assumed that focal lengthIt is known that acquiringRange, in turn Select suitable CMOS 5.Distance of 19 center of known incident light to main shaft, the distance of CMOS 5 to lensl, concavees lens Rotate angle, byIt obtains, rotate angleRange between 12 ° to 15 °.It will be upper Value is stated to substitute into formula respectively and solve as differenceRange, then carry out CMOS 5 reasonable selection.

In fact, the distance that projects to main shaft of the theoretical refraction light 20 after lens on CMOS 5Be it is known, And focal lengthIt is unknown, the focal length of lens can be calculated according to the similar principle of triangle, Focal power。

In addition to the implementation, the utility model can also have other embodiments.It is all to use equivalent replacement or equivalent change The technical solution to be formed is changed, the protection scope of the requires of the utility model is all fallen within.

Claims (10)

1. a kind of more optical axis progressive multi-focus lens focal power measuring devices, it is characterised in that: including light source (1), collimation lens (2), microscope base (4) and optical receiver (5), the microscope base (4) are mainly made of XY mobile station and pivot angle platform, the XY mobile station packet Workbench (6) and the X being arranged on workbench (6) side are included to driving mechanism (8) and Y-direction driving mechanism (9), in the work Make that pivot angle platform is arranged on platform (6), the pivot angle platform includes pivot angle pedestal and is arranged in pivot angle pedestal and can be along pivot angle pedestal wall The rotary shaft (10) moved up and down, the rotary shaft (10) connect the eyeglass support for installing eyeglass to be measured (3).

2. a kind of more optical axis progressive multi-focus lens focal power measuring devices according to claim 1, it is characterised in that: the X The first straight line sliding rail for including X-direction stepper motor to driving mechanism (8) and extending in X direction, the first straight line sliding rail with One transverse sides of workbench (6) match, and the workbench (6) is connected by the first actuator with X-direction stepper motor.

3. a kind of more optical axis progressive multi-focus lens focal power measuring devices according to claim 2, it is characterised in that: the Y To driving mechanism (9) include Y-direction stepper motor and along Y-direction extend second straight line sliding rail, the second straight line sliding rail with One longitudinal side of workbench (6) matches, and the workbench (6) is connected by the second actuator with Y-direction stepper motor.

4. a kind of more optical axis progressive multi-focus lens focal power measuring devices according to claim 3, it is characterised in that: the X Direction stepper motor is connect by control line with the X-direction control button (12) that first straight line sliding rail one end is arranged in, the side Y It is connect to stepper motor by control line with the Y-direction control button (11) that second straight line sliding rail one end is arranged in.

5. a kind of more optical axis progressive multi-focus lens focal power measuring devices according to claim 1, it is characterised in that: the pendulum Angle pedestal is made of two column (7) symmetrically arranged on the left and the right, and a rotary shaft (10) is connected between two columns (7).

6. a kind of more optical axis progressive multi-focus lens focal power measuring devices according to claim 5, it is characterised in that: described vertical The inside of column (7) has vertically extending strip axis hole, and the both ends of the rotary shaft (10) are inserted respectively into strip axis hole In, middle part is equipped with eyeglass support, and the rotary shaft (10) is connected by actuator with Z-direction stepper motor.

7. a kind of more optical axis progressive multi-focus lens focal power measuring devices according to claim 6, it is characterised in that: the mirror Piece support is an oblate cylinder, and the top of the oblate cylinder is equipped with the cavity for placing eyeglass to be measured, in the cavity Top is equipped with the fixation bracket for clamping eyeglass to be measured.

8. a kind of more optical axis progressive multi-focus lens focal power measuring devices according to claim 7, it is characterised in that: described recessed The bottom of chamber has first through hole up and down, and being corresponded at first through hole on the workbench (6) has up and down Second through-hole is provided with optical receiver (5) below the workbench (6).

9. a kind of more optical axis progressive multi-focus lens focal power measuring devices according to claim 8, it is characterised in that: described The size for being dimensioned slightly smaller than eyeglass to be measured (3) of one through-hole, the second through-hole.

10. a kind of more optical axis progressive multi-focus lens focal power measuring devices according to claim 9, it is characterised in that: described Optical receiver is CMOS.