EP0433114A1 - Verfahren und Vorrichtung zur Randdickeabmessung eines Brillenglases - Google Patents

Verfahren und Vorrichtung zur Randdickeabmessung eines Brillenglases Download PDF

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Publication number
EP0433114A1
EP0433114A1 EP90403223A EP90403223A EP0433114A1 EP 0433114 A1 EP0433114 A1 EP 0433114A1 EP 90403223 A EP90403223 A EP 90403223A EP 90403223 A EP90403223 A EP 90403223A EP 0433114 A1 EP0433114 A1 EP 0433114A1
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EP
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Prior art keywords
measuring
radius vector
lens
edge thickness
edge
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EP90403223A
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English (en)
French (fr)
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EP0433114B1 (de
Inventor
Takahiro C/O Kabushiki Kaisha Topcon Watanabe
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Topcon Corp
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Topcon Corp
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
    • B24B47/00—Drives or gearings; Equipment therefor
    • B24B47/22—Equipment for exact control of the position of the grinding tool or work at the start of the grinding operation
    • B24B47/225—Equipment for exact control of the position of the grinding tool or work at the start of the grinding operation for bevelling optical work, e.g. lenses

Definitions

  • This invention relates to a method and an apparatus for measuring the edge thickness of a spectacle lens.
  • This conventional apparatus for measuring the edge thickness is constituted such that the thickness can be measured based on the lens rim shape of the spectacle frame measured by the frame shape measuring device 10 as shown schematically in Fig. 6.
  • the edge thickness measuring apparatus is shown as a block diagram in Fig. 7.
  • the frame shape measuring apparatus 10 has a symmetric rotator with hexagon-sectional shapes shaped feeler 11 mounted rotatably in the tip.
  • the feeler 11 is connected with a feeler arm 12, which is rotatable about the axis of the perpendicular line As through the edge of contact 11a of the feeler 11, supported by a feeler supporting base 13.
  • the base 13 is mounted on the rail 14 turned round by a pulse motor 16 and movable by elasticity of a spring 15 fixed to another edge (not shown) of the rail 14.
  • the pulse motor 16 can work by the pulse from a pulse generator 17.
  • the moving amount ⁇ 1 of the feeler 11 is detected by a detector 19 constituted of either an encoder or a position sensor.
  • the detected moving amount ⁇ 1 is memorized in a lens rim shape memory 18 together with a supply pulse ⁇ 1 to the pulse motor 16.
  • the moving amount ⁇ 1 of the feeler is measured over the V-edge groove all around of the lens rim F.
  • the edge thickness measuring apparatus comprises an edge thickness sensor portion 20 and an electric circuit portion 30.
  • the sensor portion 20 includes a lens feeler supporting member 22, which is moved on the guide rail 21 by the driving of a feed screw 26. The screw 26 is rotated by the pulse motor 25. A material lens L is held between lens rotating shafts 28,28 and then the lens L is rotated by the rotation of the shafts 28,28 caused by the driving of the pulse motor 29.
  • the lens feeler supporting member 22 includes lens feelers 23A,23B and detectors 24A,24B.
  • the detectors 24A,24B are constituted of springs 25A,25B for pulling the lens feelers 23A,24B, and encoders or position sensors for detecting the moving amount of the feelers 23A,23B.
  • the pulse based on the length ⁇ i of the radius vector of the radius vector information ( ⁇ i , ⁇ i ) of the lens rim F is supplied into the pulse motor 25, and the feelers 23A,23B moves inside the lens feeler supporting member 22. This movement determines the position of the lens feelers 23A,23B at the point having the length ⁇ i of the radius vector from the axis of rotation of the lens rotating shafts.
  • the length ⁇ i of the radius vector is memorized in the lens rim shape memory 18.
  • the pulse based on the rotary angle (radius vector angle) ⁇ i is supplied to the pulse motor 29 and then the lens rotating shafts 28,28 are rotated.
  • This rotation of the shafts 28,28 produces the rotation of the material lens L by the rotary angle ⁇ i from the reference position.
  • the lens feeler 23A is moved by the elasticity of the spring 25A and then abutted on the front side refraction surface LF of the material lens L.
  • the moving amount f Z i is detected by the detector 24A and memorized in a lens data memory 31.
  • the lens feeler 23B is moved by the elasticity of the spring 25B and then abutted on the back side refraction surface LB and the moving amount b Z i is detected by the detector 24B and memorized in a lens data memory 31.
  • the lens L is automatically ground. And formed is a configuration that the sectional shape of the lens L is graphically displayed on a display 33.
  • the positions of the contact of the lens feelers 23A,23B with the lens L is taken on the tangent line Q through the V-edge apex Y formed in the V-edge grinding of the lens.
  • the edge thickness ⁇ i on the tangent line Q is calculated by the first arithmetic circuit 32.
  • the radius of curvature R of the front surface of the lens L is different from that of the back(rear)surface, and the edge thickness of the base B of the edge surface of the lens L to form a V-edge is exactly ⁇ i ′. Therefore the calculation of the treated V-edge apex position information ( k Z i , ⁇ i , ⁇ i ) not based on the edge thickness ⁇ i ′ of the base B is inaccurate.
  • V-edge apex position information ( k Z i , ⁇ i , ⁇ i ) is calculated based on the edge thickness ⁇ i ′ when the lens is ground with the grinder G. As shown in Fig.
  • V-edge (V-ridge) formed actually on the lens L is an inadequate V-edge in case the edge thickness is smaller than the width (W) of V-edge groove of the grinder G, because the edge surface K of the lens L to grind actually is displaced from the position of the measured edge surface KM owing to the difference between the radius of curvature R f of the front surface of the lens L and the radius of curvature R b of the back surface, in case even if the V-edge apex position information ( k Z i , ⁇ i , ⁇ i ) is obtained based on the edge thickness ⁇ i ′ measured by the above method such that the V-edge apex Y is formed at the point where the edge thickness is divided in the ratio of one to one, for example.
  • the first means of the present invention is characterized in the following six steps for resolving the above mentioned problem.
  • the first step is an input of the all round radius vector information ( ⁇ i , ⁇ i ) of the spectacle frame lens rim for framing the lens to grind.
  • the second step is the obtainment of the all round measuring vector radius information ( ⁇ i ′, ⁇ i ) by subtracting the V-­edge depth (H) of the grinder for grinding the above lens from the length ( ⁇ i ) of the radius vector of the all round radius vector information ( ⁇ i , ⁇ i ) in the first step.
  • the third step is the measurement of the edge thickness ( ⁇ i ) of the lens over the all round of the radius vector locus of the lens rim based on the all round measuring radius vector information ( ⁇ j ′, ⁇ j ) (j ⁇ i) for measuring narrower edge thickness ( ⁇ j ) than the width (W) of the grinding base by comparing the width (W) of the grinding base of the grinder with the edge thickness measured in the third step.
  • the fifth step is the obtaining of the length ( ⁇ j ⁇ ) of the re-measuring radius vector of the partial re-measuring radius vector information ( ⁇ j ⁇ , ⁇ j ) (with j ⁇ i) by the following formula:
  • the sixth step is the partial re-measurement of the edge thickness of the lens based on the part re-measuring radius vector information ( ⁇ j ⁇ , ⁇ j ).
  • the second means of the present invention is characterized in the following five steps.
  • the first step is the input of the radius vector information ( ⁇ i , ⁇ i ) of the spectacle frame lens rim for framing the lens.
  • the second step is the obtaining of the measuring radius vector information ( ⁇ i ′, ⁇ i ) by subtracting the V-edge depth (H) of the grinder for grinding the lens in the first step from the length ( ⁇ i ) of the radius vector of the radius vector information ( ⁇ i , ⁇ i ) in the first step.
  • the third step is the successive measurement of the edge thickness of the lens based on the measuring radius vector information ( ⁇ i ′, ⁇ i ).
  • the fourth step is the obtaining of the edge thickness of the lens by comparing the width (W) of the grinding base of the grinder with the edge thickness ( ⁇ i ) measured in the third step.
  • the edge thickness ( ⁇ j+1 ) of the lens is measured by the compensated measuring radius vector information ( ⁇ j+1 , ⁇ j+1 ) obtained by the following formulas: where ⁇ j+1 is the compensated radius vector length and ⁇ j+1 is the measured radius vector length (j+1)th in order from the grinding depth (II) of the grinder.
  • edge thickness ( ⁇ j+m ) of the lens is successively measured based on the measuring radius vector information ( ⁇ j+m , ⁇ j+m ) until the measured edge thickness ( ⁇ j+m-1 ) just before the thickness ( ⁇ j+m ) has a wider width than the width (W) of the grinding base.
  • the third means of the present invention is characterized in the following means.
  • a first means is an input means for inputting the all round radius vector information ( ⁇ i , ⁇ i ) of the spectacle frame lens rim for framing the lens.
  • a second means is an arithmetic means for obtaining the all round measuring radius vector information ( ⁇ i ′, ⁇ i ) by subtracting the V-edge depth (H) of the grinder for grinding the lens from the length ( ⁇ i ) of the radius vector of the all round radius vector information ( ⁇ i , ⁇ i ).
  • This arithmetic means is constituted such that the length ( ⁇ j ⁇ ) of re-measuring radius vector of the partial re-­measuring radius vector information ( ⁇ j ⁇ , ⁇ j ) (with j ⁇ i) is obtained by the following formula:
  • a third means is an edge thickness measuring means for measuring the edge thickness ( ⁇ i ) of the lens over the all round of the radius vector locus of the lens rim based on the all round measuring radius vector information ( ⁇ i ′, ⁇ i ).
  • This edge thickness measuring means is constituted such that the edge thickness of the lens is measured again and partly based on the partial re-measuring radius vector information ( ⁇ j ⁇ , ⁇ j ).
  • a fourth means is a memory means for memorizing the width (W) of the grinding base of the grinder beforehand.
  • a fifth means is a comparison means for comparing the width (W) of the grinding base with the measured edge thickness ( ⁇ i ) and obtaining the partial measuring radius vector information ( ⁇ j ′, ⁇ j ) (with j ⁇ i) for the edge thickness ( ⁇ j ) narrower than the width (W) of the grinding base.
  • the fourth means of the present invention is characterized in the following means and constitutions.
  • a first means is an input means for inputting the radius information ( ⁇ i , ⁇ i ) of the spectacle frame lens rim for framing the lens.
  • a second means is an arithmetic means for obtaining the measuring radius vector information ( ⁇ i ′, ⁇ i ) by subtracting the V-edge height (H) of the grinder for grinding the lens from the radius vector length ( ⁇ i ) of the radius vector information.
  • a third means is an edge thickness measuring means for successively measuring the edge thickness of the lens over the radius vector locus of the lens based on the measuring radius vector information ( ⁇ i ′, ⁇ i ).
  • a fourth means is a memory means for memorizing the width (W) of the V-­edge of the grinder beforehand.
  • a fifth means is a comparison means for in order comparing the measured edge thickness ( ⁇ i ) with the width (W) of the grinding base. If the comparison means judges that the measured edge thickness ( ⁇ j ) of the j-th (in the order of) measuring radius vector information ( ⁇ j ′, ⁇ j ) is narrower than the width (W) of the grinding base, the arithmetic means if constituted such that the compensated measuring radius vector is obtained by the following formulas: where ( ⁇ j+1 ) is the compensated radius vector length, and ( ⁇ j+1 ) is the ( ⁇ j+1 ) th measuring radius vector length.
  • the edge thickness measuring means measures the edge thickness ( ⁇ j+m ) of the lens based on the compensated measuring radius vector information ( ⁇ j+m , ⁇ j+m ) until the measured edge thickness ( ⁇ j+m-1 ) immediately before the thickness ( ⁇ j+m ) is wider than the width (W) of the grinding base.
  • Fig. 1 is a block diagram showing a constitution of the embodiment of the edge thickness measuring apparatus according to the present invention.
  • a first arithmetic circuit 32 in Fig. 1 calculates an edge thickness information ( ⁇ i , ⁇ i ) from a front and back surface position informations ( f Z i , ⁇ i ), ( b Z i , ⁇ i ) of a material lens L as a lens to grind which is detected by detectors 24A,24B.
  • This first arithmetic circuit 32 also connects with a comparison circuit 41.
  • the comparison circuit 41 connects with a grinder shape memory 42 which keeps memorizing an already-known V-edge base width W and a V-edge height H.
  • the second arithmetic circuit 43 connects with a lens rim shape memory 18 of a frame shape measuring apparatus 10, the comparison circuit 41, and the grinder shape memory 42.
  • the lens rim shape memory 18 memorizes the all round radius vector information (hereinafter referred to as radius vector information, for brevity) ( ⁇ i , ⁇ i ) (with i - 0,1,2,3,...N) can be identical with a value measured by the frame shape measuring apparatus 10 such as the conventional apparatus disclosed in Japanese Patent Publication No. SHO 60-115079, or with data memorized in a memory means such as a floppy disk or an IC card, or with data from a framemaker or the agent by the on-line information processing system.
  • radius vector information hereinafter referred to as radius vector information, for brevity
  • the memory 18 and the second arithmetic circuit 43 act as an input means and an arithmetic means, respectively.
  • the length ( ⁇ i ′) obtained is input in a pulse motor 29.
  • the pulse motors 25,29 are driven and controlled by the second arithmetic circuit 43, corresponding to the measuring radius vector information ( ⁇ i ′, ⁇ i ).
  • the driving of the pulse motors 25,29 makes the lens feelers 23A,23B move to position them (23A,23B) at the measuring point ⁇ i (as shown in Figs. 3A,3B).
  • the moving amount of the lens feelers 23A,23B is detected in terms of the front and back surface position informations ( f Z i , ⁇ i ), ( b Z i , ⁇ i ) of the lens L by the detectors 24A,24B. And then, as shown in Figs.
  • the measurement of the edge thickness is carried out over the all round of the radius vector locus S to be measured, that is, all of the measuring points from the 0-th measuring point to the N-th measuring point.
  • the first arithmetic circuit 32 acts as an edge thickness measuring means.
  • the grinder shape memory 42 acts as a memorizing means and the comparison circuit 41 acts as a comparing means.
  • Fig. 3A shows the lens L as a minus lens.
  • Fig. 3B shows the lens L as a plus lens.
  • these measuring radius vector lengths ⁇ j ′ and edge thicknesses ⁇ j are input into the second arithmetic circuit 43.
  • H : W (H-d j ) : ⁇ j (3)
  • H is a V-edge height
  • W is a V-edge base width of a V-edge grinder G
  • d j is a compensated amount.
  • the amount d j is:
  • the pulse motors 25,29 driven and controlled based on these inputs move the lens feelers 23A and 23B to the positions 23A′, 23B′ as shown in Fig.
  • the lens feelers 23A and 23B measure the front and back surface position informations ( f Z j ′, ⁇ j ), ( b Z j ′, ⁇ j ) of the lens L on the partial re-­measuring loci S1′ through S4′ as shown in Figs. 3A and 3B.
  • FIGs. 4 and 5 are schematic illustration showing another edge thickness measuring method with the above mentioned edge thickness measuring apparatus.
  • the second arithmetic circuit 43 inputs the 0-th measuring radius vector ( ⁇ ⁇ ′) in the pulse motor 25 and the 0-th radius vector angle ( ⁇ ⁇ ).
  • the driving of the pulse motors 25,29 makes the lens feelers 23A,23B move to the measuring point P ⁇ (see Figs. 3A and 3B).
  • the lens feelers 23A,23B at the point P abut on the lens L by elasticity of the springs 25A,25B.
  • the moving amount of the lens feelers 23A,23B are detected as the 0-th front surface position information ( f Z ⁇ , ⁇ ⁇ ) and the 0-th back surface position information ( b Z ⁇ , ⁇ ⁇ ) of the lens L by the detectors 24A,24B.
  • the 0-th edge thickness information ( ⁇ ⁇ , ⁇ ⁇ ) calculated by the first circuit 32 is compared with the V-edge base width W of the V-edge grinder G memorized in the grinder shape memory 42.
  • the 0-th edge thickness ⁇ ⁇ is broader than the V-edge base width W in the example of Fig. 4. Therefore, the second arithmetic circuit 43 inputs the length ⁇ i ′ of the 1st measuring radius, vectorwhich follows the 0-th thickness into the pulse motor 25 and the first radius vector angle ⁇ 1, into the pulse motor 29. And the lens feelers 23A,23B are moved to and placed at the first measuring position P1.
  • the moving amounts of the lens feelers 23A,23B are detected in terms of the first front surface position information ( f Z1, ⁇ 1) and the first back surface position information ( b Z1, ⁇ 1) of the lens L by the detectors 24A,24B. And the first arithmetic circuit 32 calculates the ⁇ 1 of the first edge thickness information ( ⁇ 1, ⁇ 1) at the first measuring point P1 from the information ( f Z1, ⁇ 1), ( b Z1, ⁇ 1) the same as (2′).
  • the first edge thickness information ( ⁇ 1, ⁇ 1) calculated by the first arithmetic circuit 32 is compared with the V-edge base width W of the V-edge grinder G memorized in the grinder shape memory 42 by the comparison circuit 41.
  • the first edge thickness ⁇ 1 is broader than the V-edge base width W in the example of Fig. 4.
  • the same procedures are in order followed to the j-th measuring radius vector information ( ⁇ j ′, ⁇ j ) judged that the edge thickness ⁇ j is narrower than the V-edge base width W.
  • the second arithmetic circuit 43 changes the length ⁇ j+1 ′ of the (j+1)th measuring radius vector of the (j+1)th measuring radius vector information ( ⁇ j+1 , ⁇ j+1 ) into the first compensated radius vector length ⁇ j+1 as shown in Fig. 4.
  • the second arithmetic circuit 43 inputs the first compensated radius vector length ⁇ j+1 into the pulse motor 25 and the first compensated radius vector angle ⁇ j+1 (equivalent to the (j+i)th measuring radius vector angle ⁇ j+1 ) into the pulse motor 29. And the lens feelers 23A and 23B are moved to the position of the first compensated measuring point T j+1 in Figs. 4 and 5(b) based on these inputs.
  • the first arithmetic circuit 32 obtains the j+1 edge thickness ⁇ j+1 from the front and back surface position informations of the lens L at the first compensated measuring point T j+1 .
  • the comparison circuit 41 compares the (j+1)th edge thickness ⁇ j+1 with the j-th edge thickness ⁇ j preceding to ⁇ j+1 .
  • the second arithmetic circuit 43 changes the following (j+2)th measuring radius vector length ⁇ j+2 ′ of the (j+2)th measuring radius vector information ( ⁇ j+2 ′, ⁇ j+2 ) into the second compensated radius vector length ⁇ j+2 as shown in Fig. 4.
  • the second arithmetic circuit 43 inputs the second compensated radius vector length ⁇ j+2 into the pulse motor 25 and the second compensated radius vector angle ⁇ j+2 (equivalent to the (j+2)th measuring radius vector angle ⁇ j+2 ) into the pulse motor29, respectively.
  • the lens feelers 23A,23B move to the second compensated measuring point T j+2 shown in Fig. 4 and Fig. 5(c) based on these inputs.
  • the first arithmetic circuit 32 After the measurement of the front and back surface position informations of the lens L at the second compensated measuring point T j+2 , the first arithmetic circuit 32 obtains the (j+2)th edge thickness ⁇ j+2 .
  • the comparison circuit 41 compares the (j+2)th edge thickness ⁇ j+2 with the (j+1)th edge thickness preceding to the (j+2)th thickness.
  • the second arithmetic circuit 43 changes the following (j+3)th measuring radius vector length ⁇ j+3 ′ of the (j+3)th measuring radius vector information ( ⁇ j+3 ′, ⁇ j+3 ) into the third compensated radius vector length ⁇ j+3 .
  • the second arithmetic circuit 43 inputs the third compensated radius vector length ⁇ j+3 into the pulse motor 25 and the third compensated radius vector angle ⁇ j+3 (equivalent to the (j+3)th measuring radius vector angle ⁇ j+3 ) into the pulse motor29, respectively. And then the lens feelers 23A,23B are moved to the third compensated measuring point T j+3 as shown in Figs. 4 and 5(d). And then the lens feelers 23A,23B are moved to the third compensated measuring point T j+3 as shown in Figs. 4 and 5(d).
  • the front and back surface position information s of the lens L as the third compensated measuring point T j+3 are measured, and then the first arithmetic circuit 32 calculates the (j+3)th edge thickness ⁇ j+3 . And the comparison circuit 41 compares the (j+3)th edge thickness ⁇ j+3 with the preceding (j+2)th edge thickness ⁇ j+2 .
  • the second arithmetic circuit 43 changes the following (j+4)th measuring radius vector length ⁇ j+4 ′ of the (j+4) measuring radius vector information ( ⁇ j+4 ′, ⁇ j+4 ) into the fourth compensated radius vector length ⁇ j+4 as shown in Fig. 4.
  • the second arithmetic circuit 43 inputs the fourth compensated radius vector length ⁇ j+4 into the pulse motor 25 and the fourth compensated radius vector angle ⁇ j+4 (equivalent to the (j+4)th measuring radius vector angle ⁇ j+4 ) into the pulse motor29, respectively. And then the lens feelers 23A,23B are moved to the fourth compensated measuring point T j+4 as shown in Figs. 4 and 5(e).
  • the front and back surface position information s of the lens L as the fourth compensated measuring point T j+4 are measured,and then the first arithmetic circuit 32 calculates the (j+4)th edge thickness ⁇ j+4 .
  • comparison circuit 41 compares the (j+4)th edge thickness ⁇ j+4 with the preceding (j+3)th edge thickness ⁇ j+3 .
  • the following (j+5)th measuring radius vector information ( ⁇ j+5 ′, ⁇ j+5 ) does not need to be changed,and the measuring of the edge thickness at the measuring point T j+5 on the measuring radius vector locus S as shown in Fig. 5(f) is carried out.
  • the measuring edge thickness ⁇ j first turns narrower than the V-edge base width W
  • the following first compensated measuring radius vector length ⁇ j+1 for the (j+1)th measuring radius vector ⁇ j+1 ′ is changed from the first compensated amount t1 of the formula (6) to the formula (7):
  • the (j+1)th edge thickness is measured at the (j+1)th measuring point T j+1 as a changed position.
  • the second compensated measuring radius vector length ⁇ j+2 and the measuring edge thickness ⁇ j+m-1 preceding to the ⁇ j+2 is changed into the (m)th compensated measuring radius vector length ⁇ j+m broader than the V-edge base width W.
  • the (m)th compensated amount tm in a generalized formula of the formulas (8) through (13) is expressed as follows :
  • the measurement of the thickness is carried out at the compensated measuring point on the compensated locus S′ shown with the stitch line in Fig. 4.
  • the present invention can provide a method and an apparatus for measuring the edge thickness of a spectacle lens, which has an advantage to measure more accurately the edge thickness of the lens narrower than the width of the V-edge base of the V-edge grinder in comparison with the prior art.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Grinding And Polishing Of Tertiary Curved Surfaces And Surfaces With Complex Shapes (AREA)
  • Length Measuring Devices With Unspecified Measuring Means (AREA)
EP19900403223 1989-11-15 1990-11-14 Verfahren und Vorrichtung zur Randdickeabmessung eines Brillenglases Expired - Lifetime EP0433114B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP1296956A JPH0816611B2 (ja) 1989-11-15 1989-11-15 レンズのコバ厚測定方法およびそのための装置
JP296956/89 1989-11-15

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EP0433114A1 true EP0433114A1 (de) 1991-06-19
EP0433114B1 EP0433114B1 (de) 1995-09-06

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EP (1) EP0433114B1 (de)
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DE (1) DE69022192T2 (de)

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WO1993001024A1 (de) * 1991-07-01 1993-01-21 Wernicke & Co. Verfahren zur herstellung eines gerandeten brillenglases
FR2682058A1 (fr) * 1991-10-04 1993-04-09 Buchmann Optical Eng Appareil pour relver la topographie de la face convexe d'un verre optique et machine de pose d'un adaptateur integrant un tel appareil.
WO1993013911A1 (de) * 1992-01-13 1993-07-22 Wernicke & Co. Gmbh Vorrichtung zum facettieren von brillengläsern
EP0561186A1 (de) * 1992-03-19 1993-09-22 Wernicke & Co. GmbH Verfahren zum Formschleifen des Umfangs eines Brillenglases
FR2707107A1 (fr) * 1993-06-28 1995-01-06 Takubo Seiki Seisakusho Kk Instrument de mesure de forme de lentille.
WO1995032075A1 (de) * 1994-05-19 1995-11-30 Wernicke & Co. Gmbh Verfahren zum cnc-gesteuerten formschleifen des umfangsrandes und der dachfacette eines brillenglases
WO2007065984A1 (fr) * 2005-12-08 2007-06-14 Essilor International (Compagnie Générale d'Optique) Procede d'elaboration d'une consigne de detourage d'une lentille ophtalmique

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DE60038459T2 (de) 1999-08-06 2009-04-23 Hoya Corp. Brillenglaslinsen bearbeitungsverfahren und vorrichtung
CN112902902A (zh) * 2021-01-19 2021-06-04 深圳市金天光学科技有限公司 一种镜片厚度检测夹具及带有该夹具的厚度检测装置

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FR2555929A1 (fr) * 1983-12-02 1985-06-07 Nippon Kogaku Kk Appareil pour former le bord et biseauter des lentilles ophtalmiques
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WO1993001024A1 (de) * 1991-07-01 1993-01-21 Wernicke & Co. Verfahren zur herstellung eines gerandeten brillenglases
FR2682058A1 (fr) * 1991-10-04 1993-04-09 Buchmann Optical Eng Appareil pour relver la topographie de la face convexe d'un verre optique et machine de pose d'un adaptateur integrant un tel appareil.
WO1993013911A1 (de) * 1992-01-13 1993-07-22 Wernicke & Co. Gmbh Vorrichtung zum facettieren von brillengläsern
EP0561186A1 (de) * 1992-03-19 1993-09-22 Wernicke & Co. GmbH Verfahren zum Formschleifen des Umfangs eines Brillenglases
US5538459A (en) * 1992-03-19 1996-07-23 Wernicke & Co. Gmbh Process for measuring forward and rearward three-dimensional curves and thickness of a corrective lens
FR2707107A1 (fr) * 1993-06-28 1995-01-06 Takubo Seiki Seisakusho Kk Instrument de mesure de forme de lentille.
WO1995032075A1 (de) * 1994-05-19 1995-11-30 Wernicke & Co. Gmbh Verfahren zum cnc-gesteuerten formschleifen des umfangsrandes und der dachfacette eines brillenglases
US5934972A (en) * 1994-05-19 1999-08-10 Wernicke & Co. Gmbh NC grinding process for the circumferential edge and top facet of an ophthalmic lens
WO2007065984A1 (fr) * 2005-12-08 2007-06-14 Essilor International (Compagnie Générale d'Optique) Procede d'elaboration d'une consigne de detourage d'une lentille ophtalmique
FR2894504A1 (fr) * 2005-12-08 2007-06-15 Essilor Int Procede d'elaboration d'une consigne de detourage d'une lentille ophtalmique

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DE69022192D1 (de) 1995-10-12
JPH03158714A (ja) 1991-07-08
DE69022192T2 (de) 1996-05-09
EP0433114B1 (de) 1995-09-06
JPH0816611B2 (ja) 1996-02-21

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