CN101256114B - Lens meter - Google Patents
Lens meter Download PDFInfo
- Publication number
- CN101256114B CN101256114B CN2008100820325A CN200810082032A CN101256114B CN 101256114 B CN101256114 B CN 101256114B CN 2008100820325 A CN2008100820325 A CN 2008100820325A CN 200810082032 A CN200810082032 A CN 200810082032A CN 101256114 B CN101256114 B CN 101256114B
- Authority
- CN
- China
- Prior art keywords
- lens
- optical characteristics
- measurement target
- measurement
- row
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
- 230000003287 optical effect Effects 0.000 claims abstract description 99
- 238000001514 detection method Methods 0.000 claims abstract description 8
- 238000005259 measurement Methods 0.000 claims description 147
- 230000005622 photoelectricity Effects 0.000 claims description 3
- 238000000034 method Methods 0.000 description 9
- 230000008859 change Effects 0.000 description 8
- 230000008569 process Effects 0.000 description 7
- 230000004075 alteration Effects 0.000 description 6
- 239000000428 dust Substances 0.000 description 4
- 238000003825 pressing Methods 0.000 description 4
- 230000008901 benefit Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 230000003068 static effect Effects 0.000 description 2
- 230000007547 defect Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 230000008676 import Effects 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000006386 neutralization reaction Methods 0.000 description 1
- 230000000007 visual effect Effects 0.000 description 1
Images
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M11/00—Testing of optical apparatus; Testing structures by optical methods not otherwise provided for
- G01M11/02—Testing optical properties
- G01M11/0228—Testing optical properties by measuring refractive power
- G01M11/0235—Testing optical properties by measuring refractive power by measuring multiple properties of lenses, automatic lens meters
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B11/00—Measuring arrangements characterised by the use of optical techniques
- G01B11/26—Measuring arrangements characterised by the use of optical techniques for measuring angles or tapers; for testing the alignment of axes
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B11/00—Measuring arrangements characterised by the use of optical techniques
- G01B11/26—Measuring arrangements characterised by the use of optical techniques for measuring angles or tapers; for testing the alignment of axes
- G01B11/27—Measuring arrangements characterised by the use of optical techniques for measuring angles or tapers; for testing the alignment of axes for testing the alignment of axes
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M11/00—Testing of optical apparatus; Testing structures by optical methods not otherwise provided for
- G01M11/02—Testing optical properties
- G01M11/0221—Testing optical properties by determining the optical axis or position of lenses
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/84—Systems specially adapted for particular applications
- G01N21/88—Investigating the presence of flaws or contamination
- G01N21/95—Investigating the presence of flaws or contamination characterised by the material or shape of the object to be examined
- G01N21/958—Inspecting transparent materials or objects, e.g. windscreens
- G01N2021/9583—Lenses
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Testing Of Optical Devices Or Fibers (AREA)
Abstract
The invention provides a lens measuring apparatus capable of stably and precisely obtaining the optical characteristic of a lens, comprising a measuring optical system including an objective panel for measuring objects including a first measuring object and a second measuring object and a photoelectric detector for photoelectrically receiving measuring light beams; a calculation device for calculating optical characteristic, which comprises a first calculation device for calculating first optical characteristic according to the detection result of the first measuring object detected by the photoelectric detector and a second calculation device for calculating second optical characteristic according to the detection results of the first and second measuring objects; and a display control device, by which the second optical characteristic is displayed as the optical characteristic of a lens if the calculation result of the first calculation device or the detection result of the photoelectric detector meet predetermined conditions, or else, the first optical characteristic is displayed.
Description
Technical field
The present invention relates to measure the lens measurer of the optical characteristics that is examined lens.
Background technology
Traditionally; Known lens measurer with measurement optical system; This measurement optical system projects measuring beam and is examined on the lens; Detect measuring beam through photoelectric detector, and obtain the optical characteristics (spherical degree S, cylinder number of degrees C and astigmatic axis angle A) of lens according to testing result through lens.Such conventional lenses measuring instrument is configured to according to the optical characteristics of coming measurement of Lens around the deviation of one group of 4 measurement target (3 measurement target in principle) of measuring the optical axis layout; This deviation detects through photoelectric detector and (announces Sho60-17335 number and announce corresponding USP 3 Sho50-145249 number with unexamined japanese patent application referring to unexamined japanese patent application; 880,525).In addition; The a plurality of measurement target that are arranged in the nosepiece have also been proposed to use; So that the optical characteristics of measurement of Lens distribute with the distal part of gradual change number of degrees lens and the near lens measurer of portion (referring to 2003-75296 number corresponding USP 6,972,837 of unexamined japanese patent application).For any lens measurer, it is that measurement target on 2 to 3mm the circumference is carried out that the measurement of single vision lens is arranged in around the measuring light shaft diameter through utilization basically, because measurement target is arranged far more from measuring optical axis, the influence of aberration is just big more.
But in the measurement based near the measurement target the measurement optical axis, according to the number of degrees of lens and the state of lens surface, it is unstable that the measurement of optical characteristics becomes, and this maybe be unfavorable to the reliability of measuring accuracy.In other words, when a little less than the refractive power of lens, near the deviation of the measurement target the optical axis is little, thereby measured value trends towards instability.Specifically, when a little less than the cylinder number of degrees, greatly changed by this astigmatic axis angle that influences, make measurement result unstable and measuring accuracy is low.In addition, near the measurement of the measurement target utilizing the measurement optical axis, when in measurement zone, having cut or dust, it is unstable that measured value also becomes, unfavorable to the reliability of measuring accuracy.
Summary of the invention
The objective of the invention is, a kind of lens measurer that can highly stable and accurately obtain the optical characteristics of lens is provided.
In order to reach said target and according to the object of the invention; A kind of lens measurer of optical characteristics of measurement of Lens has: measure optical system; This measurement optical system comprises: have with predetermined pattern around the target board of measuring a plurality of measurement target that optical axis arranges, said measurement target has first measurement target and second measurement target in the second area outside the first area near the first area measuring optical axis at least; Receive photoelectric detector with photoelectricity through the measuring beam of lens; The calculation element of calculating optical characteristic, this calculation element comprise according to photoelectric detector the testing result of first measurement target is calculated lens first optical characteristics first calculation element and calculate second calculation element of second optical characteristics of lens according to the testing result of the testing result of first measurement target and second measurement target; And display control unit; If one of the result of calculation of first calculation element and testing result of photoelectric detector satisfy predetermined condition; Then show the optical characteristics of second optical characteristics as lens; And if the unmet predetermined condition, then show the optical characteristics of first optical characteristics as lens.
Other purpose of the present invention and advantage provide in following description, and from this description, obviously find out, maybe can know through putting into practice the present invention.Objects and advantages of the present invention can realize and reach through the lens measurer in claims.
Description of drawings
The embodiments of the invention that inserted in this instructions the accompanying drawing illustration that constitutes this instructions part, and be used to explain the object of the invention, advantage and principle with instructions.In the accompanying drawings,
Fig. 1 is the illustration outer chart of lens measurer according to the preferred embodiment of the invention;
Fig. 2 is the illustration optical system of lens measurer and the figure of control system according to the preferred embodiment of the invention;
Fig. 3 is the figure of the target pattern of illustration measurement target;
Fig. 4 illustrates the process flow diagram of example of operation according to the preferred embodiment of the invention; And
Fig. 5 A, 5B and 5C are the figure of the illustration display screen that is used to aim at.
Embodiment
Provide with reference to the accompanying drawings according to the preferred embodiment of the invention and describe in detail.Fig. 1 is the illustration outer chart of lens measurer according to the preferred embodiment of the invention.
When the lens in the measurement mirror holder, the frame plate 6 that can move up in front and back is contacted with the bottom (bottom when putting on one's glasses) of mirror holder, so that increase stability, thereby the benchmark of measuring the astigmatic axis angle is provided.Mark mechanism 7 is used on lens LE, making marks.READ (reading) switch 8 is used to read the data of the optical characteristics of lens LE.When pressing READ switch 8, measured value keeps static and is stored in the lens measurer on display 2.
Fig. 2 is the figure of the optical system and the control system of illustration lens measurer.Label L1 is a measurement optical axis of measuring optical system 20.Measuring optical system 20 has the measurement light source 21 such as LED on optical axis L of being arranged in 1, collimation lens 22, forms the grid panel 23 of measurement target and as the two-dimensional image sensor 24 of photoelectric detector above that.The center of the hole 4a of optical axis L 1 process nosepiece 4 also is arranged to vertical with the plane of hole 4a.Grid panel 23 is disposed near the hole 4a of nosepiece 4.Distance between the upper end of imageing sensor 24 and nosepiece 4 (the back summit of lens LE) is designed to be shorter than the shortest focal length in the measured zone of lens LE.
Fig. 3 is the figure of the target pattern of the measurement target on the illustration grid panel 23.In this example, as a plurality of circular pin hole 23 (point target) of measurement target with trellis configuration space 0.5mm geometry arrangement.Pin hole 25 is arranged to 9 row, 9 row.But a large amount of pin holes 25 also can be arranged in measuring light and pass in the zone of hole 4a of nosepiece 4.In addition, pin hole 25 0.5mm of also can between the center of pin hole 25, being separated by equably.But the present invention is not limited to above-mentioned layout, as long as adopt predetermined geometry arrangement.In the middle of pin hole 25, the pin hole H5 on the optical axis L 1 be positioned at the diameter that pin hole H1, H2, H3 and H4 on the foursquare angle of the 2mm of pin hole H5 has 0.5mm.Except that pin hole H1 has the diameter of 0.2mm to other pin hole 25 the H5.Detect the pin hole H5 that is in the center and the pin hole H1 that is arranged to have predetermined relationship discretely to H4 with other pin hole 25 with pin hole H5 with different size.The pin hole H5 that is in the center is used to detect the reference position of the deviation of pin hole 25, and said deviation photoelectricity on imageing sensor 24 receives.If because cut or dust on the lens LE and suitably do not detect the pin hole H5 that is in the center then are used as substitute with pin hole H1 to H4.In addition, even one group of pin hole H1 is arranged in the zone that the minor diameter nosepiece that is used for contact lens also can be measured to H4.
Light beam from light source 21 becomes parallel beam by collimation lens 22, and projects on the lens LE.In seeing through the light beam of lens LE, the light beam that passes the pin hole 25 on the grid panel 23 arrives imageing sensor 24.Output signal from imageing sensor 24 is transfused in the control section 40.Control section 40 is connected with the display circuit 42 that is used for the information of demonstration such as result of calculation on display 2 with the storer that is used for the storage computation result 41.
When using a plurality of measurement target; Can be through utilizing such as be arranged in 2 25 measurement target of 5 row, 5 row or measurement target of 49 measurement target of 7 row, 7 row in the 3mm diameter around optical axis L 1; Making 3 or 4 targets is one group; These targets are disposed on the same circumference also preferably adjacent one another are, and calculate the mean value of the optical characteristics of all groups, come accurately to obtain the optical characteristics of single vision lens.Also can be through using least square method and through using ray tracking method according to testing result such as the deviation of the measurement target of 25 measurement target of 5 row, 5 row and 49 measurement target of 7 row, 7 row; Obtain the best-fit regression aspect of spherical degree S, cylinder number of degrees C and astigmatic axis angle A, come the calculating optical characteristic.Can use than only coming those a large amount of measurement target of Duoing in the traditional calculations of calculating optical characteristic, come accurately to obtain the optical characteristics of single vision lens according to one group of 3 or 4 measurement target.
When measuring gradual change number of degrees lens, can be through calculating the optical characteristics of one group 4 (at least 3) adjacent measurement target (pin hole 25), the interior optical characteristics of tiny area of obtaining gradual change number of degrees lens distributes.In other words, can obtain the interior optical characteristics distribution of nosepiece hole 4a of nosepiece 4.Therefore, in the measurement of gradual change number of degrees lens, can confirm effectively whether current measuring position is in the distal part.Similarly, can confirm effectively whether current measuring position is in the nearly portion.
In the measurement of the optical characteristics of single vision lens, the pin hole 25 of definition measurement target is arranged far more from measuring optical axis L1, and the influence of aberration is just big more.Therefore, utilization is arranged near at least 3 the interior measurement target of zonule (zone of diameter 2 to 3mm) of pin hole H5 at the center of measuring the optical axis place basically, calculates the optical characteristics (first calculates) of lens LE.For example, according to based on around 25 measurement target of 5 row, 5 row of pin hole H5 or the testing result of 49 measurement target of 7 row, 7 row, come the calculating optical characteristic.But near the measurement of the measurement target utilize measuring optical axis L1, when a little less than the refractive power of lens LE, the deviation of measurement target is just little, and therefore measured value trends towards instability, thereby unfavorable to the reliability of measuring accuracy.Especially, when a little less than the cylinder number of degrees C, it is unstable that the result of calculation of astigmatic axis angle becomes, thereby unfavorable to the reliability of measuring accuracy.
Therefore; If cylinder number of degrees C is the weak diopter be scheduled to or littler; Then lens measurer comes calculating optical characteristic (second calculating) through with respect to measuring the quantity that near the optical axis L1 zonule (zone of diameter 2 to 3mm) enlarges measured zone and increases measurement target according to the preferred embodiment of the invention.If a little less than the cylinder number of degrees C, even enlarge measured zone with respect to measuring optical axis L1, the influence of aberration also is little.Therefore, through increasing the quantity of measurement target, can improve and the measuring accuracy of stable astigmatic axis angle.Hereinafter, with reference to the process flow diagram description example of operation among Fig. 4.
Lens measurer has the pattern of measuring single vision lens and the pattern of measuring gradual change number of degrees lens, in following description, selects to measure the pattern of single vision lens.The examiner specifies the switch that is presented at the right or left lens on the display 2 through pressing, and selects the right or left lens that will measure.
When lens LE being installed in 4 last times of nosepiece; In the middle of a plurality of images (image of pin hole 25) of the measurement target that control section 40 is detected according to visual detector 24; The deviation of the image of 49 measurement target of 7 row, 7 row of arranging around optical axis L 1 is calculated various measured values (spherical degree S, cylinder number of degrees C, astigmatic axis angle A and p.d.) (S-1).Fig. 5 A is the figure that illustration is presented at the display screen that is used to aim on the display 2 at this moment.Label 50 is the index dials that are used to aim at, and measured value display part 51 and 52 shows the measured value of left and right sides lens respectively.The right lens of the mark 53 current measurements of indication.Show the various measured values that obtain this moment in the measured value display part 51 on the right.In addition, with respect to the offset direction of optical axis L 1 and the bias of definition p.d., on display 2, show ring-type target 54 according to the optical centre of lens LE.Alternately, can aim at through the display position that obtains ring-type target 54 to the testing result of H5 according to pin hole H1.
When mobile lens LE and p.d. became less than 0.5 Δ, ring-type target 54 became cross curve target 55 (referring to Fig. 5 B).When only measuring diopter, through under this state, pressing READ switch 8, it is static that measurement result keeps on display 2.When on lens LE, making marks, in order to aim at mobile lens LE more accurately; Make cross curve target 55 move towards the center of index dial 50; And when p.d. became less than 0.1 Δ, cross curve target 55 became grand cross line target 57, and it notifies the examiner to accomplish accurate aligning.
In the measurement of single vision lens in front, control section 40 is with the continuous calculating optical characteristic of Fixed Time Interval.In the middle of the optical characteristics that the deviation according to the image of 49 measurement target of 7 row, 7 row of arranging around optical axis L 1 obtains; Diopter) or littler (S-2) control section 40 confirms whether the cylinder number of degrees are that (and whether spherical degree be the weak diopter ε sD that is scheduled to, D: for the weak diopter δ cD that is scheduled to.For example, with the weak diopter (negative sign being placed on the front of the cylinder number of degrees) of-0.5D or be arranged to the weak diopter δ cD that is scheduled to more for a short time.
When the cylinder number of degrees are that (and spherical degree is the weak diopter ε sD that is scheduled to or more hour for the weak diopter δ cD that is scheduled to; Even enlarge measured zone and the quantity that increases measurement target; The influence of aberration also is little; And therefore, through enlarging measured zone and coming the calculating optical characteristic, so that stably measured value and the precision that improves the astigmatic axis angle with respect to the quantity that 49 targets of 7 row, 7 row of normal use increase measurement target.Except coming the calculating optical characteristic according to 49 pin holes 25 of 7 row, 7 row, control section 40 enlarges measured zone and increases the quantity of measurement target, so that come calculating optical characteristic (S-3) according to the image around 81 measurement target of 9 row, 9 row of pin hole H5.
The further condition (alternately, confirming that as follows condition can be used as single condition) that preferably is described below and is provided for confirming.Control section 40 is relatively according to 49 measurement target of 7 row, 7 row measured value that calculates and the measured value that calculates according to 81 measurement target of 9 row, 9 row.After having compared measured value, confirm that difference separately between the above-mentioned measured value is whether in allowed band (S-4).In a preferred embodiment of the invention; If between the spherical degree and the difference between the cylinder number of degrees in the allowed band of ± 0.06D; Think that then enlarging measured zone is little with the influence that increases the caused aberration of measurement target quantity; And, calculate measured value through image according to 81 measurement target of 9 row, 9 row, can obtain measured value more reliably.Therefore, control section 40 is presented at (S-5) on the display 2 according to the image of 81 measurement target of 9 row, 9 row with result of calculation.When pressing READ switch 8, control section 40 keeps measured value to be still on the display 2 and with them to be stored in (S-6) in the storer 41.
If relatively based on after the measured value of the image of 49 measurement target of 7 row, 7 row and the measured value based on the image of 81 measurement target of 9 row, 9 row; Between the spherical degree or the difference between the cylinder number of degrees outside the allowed band of ± 0.06D; Then think the stability that can not improve measured value; Therefore, control section 40 will be shown as measured value (S-7) based on the result of calculation of the image of 49 measurement target of 7 row, 7 row.
If the cylinder number of degrees are better than predetermined weak diopter δ cD in above-mentioned steps S-2; Then when the calculating carried out based on the image of 81 measurement target of 9 row, 9 row of arranging around optical axis L 1; It is big that the influence of aberration becomes, and can guarantee the reliability of precision based on the result of calculation of the image of 49 measurement target of 7 row, 7 row.Therefore, will be shown as measured value (S-7) based on the result of calculation of the image of 49 measurement target of 7 row, 7 row simply.
In the confirming in above-mentioned steps S-4; Based on the result of calculation of the image of 49 measurement target of 7 row, 7 row and based on the switching between the result of calculation of the image of 81 measurement target of 9 row, 9 row confirm can be according to through carrying out two calculating (for example, three times) and the result that obtains makes more than once.If the difference of the measured value separately between two calculating is in the allowed band of ± 0.06D; And the deviation of the measured value separately that in three times are calculated in succession, obtains is also in the allowed band of ± 0.06D; Therefore think that then the stability of measured value and the precision of astigmatic axis angle are accessible, and in the measurement result that after this shows according to the image calculation of 81 measurement target of 9 row, 9 row.If top condition is not met, then keep simply the process that will be shown as measurement result based on the result of calculation of the image of 49 measurement target of 7 row, 7 row.This process continues, and is moved (this can identify through the variation of p.d.) greatly or up to new lens are installed in the nosepiece 4 up to lens LE.But,, also can whenever once check again separated several seconds and confirm even lens LE is not moved.
The present invention is not limited to above-mentioned preferred embodiment.Can suitably change the cylinder number of degrees of confirming that are used for step S-2 and be used in the condition among the step S-4.In the superincumbent description, between 49 measurement target of 7 row, 7 row that center on optical axis L 1 and 81 measurement target of 9 row, 9 row, switch the quantity of the image of the measurement target that will measure.But, be not limited to those quantity.For example, can normally measure around 25 measurement target of 5 row, 5 row of measuring the pin hole H5 on the optical axis L1, and when the cylinder number of degrees are weak diopter δ cD of being scheduled to or more hour, can measure the measurement target of greater number through enlarging measured zone.Alternately, can normally measure around the measurement target of measuring on the circumference that optical axis L1 is 2mm at diameter, and, when the cylinder number of degrees are weak diopter δ cD of being scheduled to or more hour, can measure the measurement target that is arranged in the larger diameter.Also alternately, can be according to the cylinder number of degrees, with the quantity of step-by-step system handover measurement target between 25 measurement target of 5 row, 5 row, 49 measurement target of 7 row, 7 row and 81 measurement target of 9 row, 9 row.
Used in the description in front through enlarging measured zone according to the number of degrees of lens LE and increasing the measurement (second measures) of the optical characteristics that the quantity of measurement target carries out.If on lens LE, have cut or dust, it also is effective then using second calculating.In the middle of the image of the measurement target (49 measurement target of 7 row, 7 row) in the zonule of measuring optical axis L1; If because the light intensity deficiency or the shape defect of the image of cut on the lens LE or the caused measurement target of dust; By the quantity of the image of the measurement target of suitable detection less than predetermined quantity or fixed ratio (40%, 50% or other number percent); Measurement result trends towards changing, thereby unfavorable to the reliability of measuring accuracy.In this case, control section 40 will show on display 2 through calculating the measurement result that obtains based on second of 81 measurement target of 9 row, 9 row.Through increasing, can improve the stability of measurement result by the quantity of the image of the measurement target of suitable detection.In addition, the raising of measuring accuracy is accessible.When being satisfied predetermined quantity or fixed ratio by the quantity of the image of the measurement target of suitable detection, control section 40 shows the measurement result according to the image calculation of 49 measurement target of 7 row, 7 row simply on display 2.
In addition, through when calculating measured value, obtaining the standard deviation of measured value separately, can only select to have the target of even value.Because can be in the calculating of carrying out optical characteristics than the testing process of the image of measurement target in the short time; So selection of the measurement target that the measurement target of after the detection separately of measurement target, carrying out adopting maybe will be refused; This process repeats, and reaches desired level up to standard deviation.Therefore, can obtain the stably measured result and not prolong Measuring Time.
When lens maker etc. uses lens measurer, may not use from based on the measurement result of 49 measurement target of 7 row, 7 row to switching based on the measurement result of 81 measurement target of 9 row, 9 row.Therefore, preferably can be through being provided in the SS on the display 2, carry out the application switch function and use in a conventional manner based on the selection between the measurement result of 49 measurement target of 7 row, 7 row.
In calculating, come the calculating optical characteristic with increase measurement target quantity through enlarging measured zone according to second of preferred embodiment.But, can only enlarge or increase any in them.For example; In first calculates, can measure 49 measurement target of 7 row, 7 row near the zonule the optical axis L1; And in second calculates, even measured zone is expanded into the zone of 81 measurement target of 9 row, 9 row, through calculating target rather than all 81 measurement target alternately; Can calculate 49 identical measurement target to quantity and first and carry out the calculating of optical characteristics, to avoid prolonging computing time.The example that only increases measurement target quantity has been described.Can replace measurement target to 25 in the measured zone of 49 measurement target of 7 row, 7 row and carry out first calculating, and in second calculates, can calculate all interior measurement target of measured zone of 49 measurement target of 7 row, 7 row.Although similar with preferred embodiment, in second calculates, preferably enlarge measured zone and increase the quantity of measurement target, only enlarge or increase that in them any can make still that the result calculates than tradition first that those are more stable.
The front has provided the description of the preferred embodiment of the present invention for illustration with for the purpose of describing.But and do not mean that nothing left leaks or make the present invention be confined to disclosed exact form, and can modify and change according to above-mentioned religious doctrine and maybe can from practice of the present invention, obtain to revise and change.Selecting and describing embodiment is in order principle of the present invention and its practical application to be described, to be made those of ordinary skill in the art can the present invention be applied in various embodiment neutralizations and make the various modifications that are fit to contemplated concrete use.Intention is to define scope of the present invention through appended claims and equivalent thereof.
Claims (4)
1. the lens measurer of the optical characteristics of a measurement of Lens comprises:
Measure optical system, comprising:
Send the light source of measuring beam;
Have with predetermined pattern around the target board of measuring a plurality of measurement target that optical axis arranges, said measurement target has first measurement target and second measurement target in the second area outside the first area near the first area measuring optical axis at least; With
Photoelectricity receives the photoelectric detector of the measuring beam that passes lens and target board;
Calculating comprises the calculation element of the optics of lens characteristic of the cylinder number of degrees and spherical degree; Said calculation element calculates the first cylinder number of degrees that comprise lens and first optical characteristics of first spherical degree according to photoelectric detector to the testing result of first measurement target under the single vision lens measurement pattern, and according to photoelectric detector the testing result of first and second measurement target is calculated the second cylinder number of degrees that comprise lens and second optical characteristics of second spherical degree;
Display; And
The display control unit of the demonstration on the control display; If one of testing result of the result of calculation of calculation element and photoelectric detector satisfies predetermined condition; Then display control unit is controlled said display and is shown the optical characteristics of second optical characteristics as lens under the single vision lens measurement pattern; And display control unit controls said display and shows the optical characteristics of first optical characteristics as lens, only if one of testing result of the result of calculation of calculation element and photoelectric detector satisfies said predetermined condition.
2. lens measurer according to claim 1; Wherein, Said display control unit dioptric situation and first cylinder number of degrees a little less than the first cylinder number of degrees are scheduled to be a little less than the weak diopter be scheduled to and first spherical degree are scheduled to one of dioptric situation down, the said display of control shows the optical characteristics of second optical characteristics as lens under the single vision lens measurement pattern.
3. lens measurer according to claim 1; Wherein, If the difference between first optical characteristics and second optical characteristics is in allowed band, then said display control unit is controlled said display and is shown the optical characteristics of second optical characteristics as lens under the single vision lens measurement pattern.
4. lens measurer according to claim 1; Wherein, Said display control unit is controlled said display and is shown the optical characteristics of second optical characteristics as lens under the single vision lens measurement pattern, only if satisfied one of fixed ratio and predetermined quantity by the quantity of first measurement target of photoelectric detector suitable detection.
Applications Claiming Priority (6)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP200750813 | 2007-02-28 | ||
| JP2007-50813 | 2007-02-28 | ||
| JP2007050813 | 2007-02-28 | ||
| JP200825638 | 2008-02-05 | ||
| JP2008-25638 | 2008-02-05 | ||
| JP2008025638A JP5202011B2 (en) | 2007-02-28 | 2008-02-05 | Lens meter |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101256114A CN101256114A (en) | 2008-09-03 |
| CN101256114B true CN101256114B (en) | 2012-08-08 |
Family
ID=39891097
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2008100820325A Expired - Fee Related CN101256114B (en) | 2007-02-28 | 2008-02-28 | Lens meter |
Country Status (3)
| Country | Link |
|---|---|
| JP (1) | JP5202011B2 (en) |
| KR (1) | KR101437175B1 (en) |
| CN (1) | CN101256114B (en) |
Families Citing this family (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5862139B2 (en) * | 2010-09-30 | 2016-02-16 | 株式会社ニデック | Lens meter and single focus lens evaluation program |
| KR101244637B1 (en) * | 2011-04-08 | 2013-03-18 | 주식회사 휴비츠 | Apparatus and method for measuring UV transmittance of eyeglass lens |
| JP2014199303A (en) | 2013-03-29 | 2014-10-23 | 株式会社ニデック | Spectacle lens measuring device, method of discriminating top and bottom of spectacle lens, and dot adapter disposed on the spectacle lens measuring device |
| JP6536029B2 (en) * | 2014-12-12 | 2019-07-03 | 株式会社ニデック | Lens meter and calculation program |
| JP6984163B2 (en) | 2016-07-05 | 2021-12-17 | 株式会社ニデック | Lens meter |
| CN107796596A (en) | 2016-08-30 | 2018-03-13 | 尼德克株式会社 | Lens determining device and lens determining device marking plate |
| EP3438635A3 (en) | 2017-07-31 | 2019-06-12 | Nidek Co., Ltd. | Glasses measurement apparatus |
| KR101964214B1 (en) * | 2017-11-17 | 2019-04-01 | 주식회사 포텍 | Measuring method of lens meter using damaged multi-light tracing |
| JP7087366B2 (en) | 2017-12-05 | 2022-06-21 | 株式会社ニデック | Axis setting device, spectacle lens processing system, and spectacle lens processing method |
| JP7143652B2 (en) | 2018-07-02 | 2022-09-29 | 株式会社ニデック | Eyeglass measurement system and eyeglass measurement program |
| WO2021059531A1 (en) * | 2019-09-27 | 2021-04-01 | 株式会社レクザム | Lens optical characteristics measurement device, lens optical characteristics measurement method, program, and recording medium |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001124662A (en) * | 1999-10-25 | 2001-05-11 | Topcon Corp | Lens meter |
| EP1251401A1 (en) * | 2001-04-20 | 2002-10-23 | Infineon Technologies SC300 GmbH & Co. KG | Method of measuring the aberration of a projection lens |
| CN1690680A (en) * | 2004-04-23 | 2005-11-02 | 株式会社尼德克 | Lens meter |
| CN1690679A (en) * | 2004-04-27 | 2005-11-02 | 株式会社尼德克 | Lens meter |
| FR2880118A1 (en) * | 2004-12-23 | 2006-06-30 | Essilor Int | Lens e.g. ophthalmic lens, refraction characteristics e.g. spherical power, measuring method for e.g. optician, involves maintaining lens fixed with respect to lighting unit, where position of measurement axis is variable |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001188030A (en) * | 1999-12-28 | 2001-07-10 | Topcon Corp | Lens meter |
| JP4646014B2 (en) * | 2001-08-09 | 2011-03-09 | 株式会社ニデック | Lens meter |
| JP4421332B2 (en) * | 2004-02-27 | 2010-02-24 | 株式会社ニデック | Lens meter |
-
2008
- 2008-02-05 JP JP2008025638A patent/JP5202011B2/en not_active Expired - Fee Related
- 2008-02-28 CN CN2008100820325A patent/CN101256114B/en not_active Expired - Fee Related
- 2008-02-28 KR KR1020080018177A patent/KR101437175B1/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001124662A (en) * | 1999-10-25 | 2001-05-11 | Topcon Corp | Lens meter |
| EP1251401A1 (en) * | 2001-04-20 | 2002-10-23 | Infineon Technologies SC300 GmbH & Co. KG | Method of measuring the aberration of a projection lens |
| CN1690680A (en) * | 2004-04-23 | 2005-11-02 | 株式会社尼德克 | Lens meter |
| CN1690679A (en) * | 2004-04-27 | 2005-11-02 | 株式会社尼德克 | Lens meter |
| FR2880118A1 (en) * | 2004-12-23 | 2006-06-30 | Essilor Int | Lens e.g. ophthalmic lens, refraction characteristics e.g. spherical power, measuring method for e.g. optician, involves maintaining lens fixed with respect to lighting unit, where position of measurement axis is variable |
Also Published As
| Publication number | Publication date |
|---|---|
| KR101437175B1 (en) | 2014-09-03 |
| JP2008241694A (en) | 2008-10-09 |
| KR20080080048A (en) | 2008-09-02 |
| CN101256114A (en) | 2008-09-03 |
| JP5202011B2 (en) | 2013-06-05 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101256114B (en) | Lens meter | |
| US9891050B2 (en) | Measuring device having a function for calibrating a display image position of an electronic reticle | |
| JPH0466834A (en) | Automatic lens meter | |
| EP1965189B1 (en) | Lens Meter | |
| US6972837B2 (en) | Lens meter | |
| CN100561165C (en) | Lens meter | |
| US6657710B2 (en) | Lens meter | |
| US7609371B2 (en) | Lens meter | |
| KR101126155B1 (en) | Lens meter | |
| JPH0618363A (en) | Lens meter | |
| KR101126150B1 (en) | Lens meter | |
| CN104516210A (en) | Telecentric measurement apparatus and telecentric measurement method used in lens in lithography machine | |
| JP5397882B2 (en) | Lens meter | |
| JP3069311B2 (en) | Automatic lens meter | |
| JP3011742B2 (en) | Automatic lens meter | |
| JP3069320B2 (en) | Automatic lens meter | |
| JP3396676B2 (en) | Lens meter | |
| JP3429109B2 (en) | Lens meter | |
| JP2006275971A (en) | Lens meter | |
| JPH11337445A (en) | Lens meter | |
| JP4781705B2 (en) | Lens meter | |
| KR101374173B1 (en) | Lensmeter for vertex distance adjustable and vertex distance adjust method | |
| CN118463838A (en) | A bridge deflection measuring instrument and a bridge deflection measuring method | |
| JPH06102138A (en) | Refractive characteristic measuring device | |
| JPH0943101A (en) | Lens-meter |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20120808 Termination date: 20170228 |