JP5599053B2 - Terminal for controlling spectacle lens processing machine, spectacle lens processing system, program and method - Google Patents

Description

  In the present invention, the other surface (or both surfaces) of a semi-finished lens (semi) formed in advance as a final optical surface or a surface equivalent thereto is processed into a desired lens surface shape. In a spectacle lens processing machine control terminal or spectacle lens processing system for obtaining spectacle lenses, a program capable of constructing the control terminal by causing the computer to execute the program, and the control terminal, system, and program The present invention relates to an executable spectacle lens processing method.

  As a method of manufacturing a spectacle lens using a semi-finished product, a method described in Patent Document 1 below is known. In this manufacturing method, a combination of spectacle lens curved surfaces is calculated on the basis of the customer's desired spectacle lens prescription data input to the manufacturer's host computer online, and a semi-semiconductor that matches the curved surface of the table is selected. The shape data that matches the curved surface is designed, the machining conditions of the numerically controlled machine tool are selected based on the shape data, and the semi-back surface is cut and polished. Further, in Patent Document 1, “for the purpose of reducing the outer diameter of the lens” ([0076] 2 lines), it is disclosed that the eccentric processing is performed when the prescription data includes the eccentric processing. .

Japanese Patent No. 4029576

  In this spectacle lens processing method, semi-curved surface processing conforming to the prescription data can be performed, but it is inconvenient because it is not possible to perform processing of the target lens shape for insertion into the spectacle frame. In addition, although there is a suggestion that eccentric processing can be performed, it has only the purpose of reducing the outer diameter of the lens, and only performs eccentricity as much as the prescription data, considering various conditions. It is not something that dynamically decenters.

  Therefore, in this spectacle lens processing method, when the outer diameter is reduced due to the eccentricity, the volume of the cicada may be reduced accordingly, but due to the eccentricity, the back side of the processed cicada becomes a convex surface in calculation. Avoid situations where machining is not possible, improve the situation where the edges of the semi-chip are missing (scratch) when processing a semi-curved surface, and the part where the semi-thickness is insufficient at the semi-lens position To save the main lens material and to improve processing conditions and portability by reducing the insufficient thickness and selecting the smallest volume from multiple types of semis with sufficient semi-thickness These objects are not actively realized, nor are these objects achieved in a superimposed or selective manner.

An object of the present invention, in consideration of various conditions, a various purposes can execute versatile eccentric machining is possible play in a condition suitable to each order data, also per the process of multi-purpose consideration Another object of the present invention is to provide a control terminal for a spectacle lens processing machine, a spectacle lens processing system, a program, and a method capable of executing a relatively simple execution without composing complicated calculation processing each time.

In order to solve the above-described problem, the invention according to claim 1 is a control terminal for a spectacle lens processing machine, and by processing at least one surface of a semi-finished lens, the shape of the target lens shape data is reduced. Controls a processing machine that forms a round lens for spectacle lenses in a state of consideration, can receive order data including the target lens shape data and eye points, and from the geometric center of the semi-finished lens With the eye point shifted and decentered, it is possible to calculate processing data related to the surface of the semi-finished lens according to the order data, and the target lens shape data protrudes from the round lens. In the range not to be moved, the vertical and / or horizontal direction is shifted by a predetermined set value, and the machining data at each position is changed. Based on the result of calculating the data, select the eccentric positions of set conditions the most advantageous the eye point, and importance is attached by ranking and / or weighting the plurality set the condition The degree of importance can be changed, and one of the plurality of set conditions relates to the improvement of edge blurring in which the minimum value of the edge thickness in the round lens after processing is set to a predetermined value or more. <Br It is characterized by this.

The invention according to claim 2 controls a processing machine that forms a round lens for a spectacle lens by processing at least one surface of the semi-finished lens in consideration of the layout of the target lens shape data. A control terminal that can receive the target data including the target lens shape data and the eye point, and the order data is decentered by shifting the eye point from the geometric center of the semi-finished lens. The processing data relating to the surface of the semi-finished lens according to the above can be calculated, and the eyepoint is set at predetermined set values in the vertical direction and / or the horizontal direction within a range in which the target lens shape data does not protrude from the round lens. And based on the result of calculating the machining data at each position, Select an advantageous eccentric position of the eye point, and a plurality of set conditions are given importance by ranking and / or weighting, the importance can be changed, and a plurality of the conditions set In one of the above, when the surface to be processed in the round lens is a surface on the eyeball side, a situation in which the surface becomes convex and cannot be processed, or the surface to be processed in the round lens is an object. In the case of a side surface, the surface is a concave surface and avoids a situation where machining is impossible, and avoids a situation where machining is impossible.
The invention according to claim 3 controls the processing machine that forms the round lens for the spectacle lens by processing at least one surface of the semi-finished lens in consideration of the layout of the target lens shape data. A control terminal that can receive the target data including the target lens shape data and the eye point, and the order data is decentered by shifting the eye point from the geometric center of the semi-finished lens. The processing data relating to the surface of the semi-finished lens according to the above can be calculated, and the eyepoint is set at predetermined set values in the vertical direction and / or the horizontal direction within a range in which the target lens shape data does not protrude from the round lens. And based on the result of calculating the machining data at each position, Select an advantageous eccentric position of the eye point, and a plurality of set conditions are given importance by ranking and / or weighting, the importance can be changed, and a plurality of the conditions set One of the set values is an amount that the calculated lens edge thickness calculated from the order data exceeds the thickness of the semi-finished lens along the lens shape data laid out on the semi-finished lens. It is related to the reduction of uncut residue.
The invention according to claim 4 controls the processing machine that forms the round lens for the spectacle lens by processing at least one surface of the semi-finished lens in consideration of the layout of the target lens shape data. A control terminal that can receive the target data including the target lens shape data and the eye point, and the order data is decentered by shifting the eye point from the geometric center of the semi-finished lens. The processing data relating to the surface of the semi-finished lens according to the condition can be calculated, and the eyepoint includes a state where the eye shape data is closer to the ear side than the geometric center in a range in which the lens shape data does not protrude from the round lens To shift the vertical and / or horizontal direction for each set value and calculate the machining data at each position. Based on the results, it is characterized in that selecting the eccentric positions of set conditions the most advantageous the eye point.

  In addition to the above-mentioned problems, the invention described in claim 5 avoids a situation in which high-value-added spectacle lenses that require complicated processing cannot be actively processed, saves materials, improves processing conditions, and causes flicking. In order to solve the problem of appropriately fulfilling at least one of the purposes of improvement, securing a target lens shape, reducing uncut material, etc., in the above invention, the round lens is an inner surface progressive addition lens, To do.

In order to solve the problem of increasing the number of round lenses that have achieved the object, the invention described in claim 6 can be processed without eliminating all possibilities for achieving the object. in the invention, characterized in that the magnitude of the eccentric position larger than the size of the eccentric position that minimizes the round lens.

In order to solve the above-mentioned problems, an invention according to claim 7 is an eyeglass lens processing system including the above-described control terminal.

In order to solve the above-mentioned problem, the invention according to claim 8 is an eyeglass lens processing program, and is executed by a computer, whereby a control terminal for the eyeglass lens processing system can be constructed. It is a feature.

In order to solve the above problem, the invention according to claim 9 forms a round lens for a spectacle lens by processing at least one surface of a semi-finished lens in consideration of the layout of target lens shape data. An eyeglass lens processing method, the order receiving step receiving order data including the target lens shape data and eye point, and the order in a state where the eye point is decentered by shifting the eye point from the geometric center of the semi-finished lens. A decentration calculation step of calculating processing data related to the surface of the semi-finished lens according to the data, and the eyepoint are determined in a vertical direction and / or a horizontal direction within a range in which the target lens shape data does not protrude from the round lens. after having shifted for each setting value, based on the result of calculating the processed data at each position, multiple sets Look including the conditions the most advantageous to select the eccentric position of the eye point condition selection setting step, and importance is attached by ranking and / or weighting the plurality set the condition, the severity Can be changed, and one of the plurality of conditions is related to the improvement of edge blurring, in which the minimum value of the edge thickness of the round lens after processing is set to a predetermined value or more. It is.
The invention according to claim 10 is a spectacle lens processing method for forming a round lens for spectacle lenses by processing at least one surface of a semi-finished lens in consideration of a layout of target lens shape data. Receiving the order data including the target lens shape data and the eye point, and the semi-finished according to the order data in a state where the eye point is shifted from the geometric center of the semi-finished lens and decentered. An eccentricity calculation step for calculating processing data relating to the lens surface, and the eye point are shifted by a predetermined set value in the vertical direction and / or the horizontal direction within a range in which the target lens shape data does not protrude from the round lens. Based on the results of calculating machining data at each position, it is most advantageous in terms of multiple set conditions Including a condition selection setting step for selecting the eccentric position of the eye point, and the plurality of conditions are assigned importance levels by ranking and / or weighting, and the importance levels can be changed. One of the conditions is that when the surface to be processed in the round lens is a surface on the eyeball side, a situation in which the surface becomes a convex surface and cannot be processed, or processing in the round lens is performed. When the surface to be processed is a surface on the object side, it is related to avoiding a situation where machining is impossible because the surface becomes concave and the machining becomes impossible.
The invention according to claim 11 is a spectacle lens processing method for forming a round lens for spectacle lenses by processing at least one surface of a semi-finished lens in consideration of a layout of target lens shape data. Receiving the order data including the target lens shape data and the eye point, and the semi-finished according to the order data in a state where the eye point is shifted from the geometric center of the semi-finished lens and decentered. An eccentricity calculation step for calculating processing data relating to the lens surface, and the eye point are shifted by a predetermined set value in the vertical direction and / or the horizontal direction within a range in which the target lens shape data does not protrude from the round lens. Based on the results of calculating machining data at each position, it is most advantageous in terms of multiple set conditions Including a condition selection setting step for selecting the eccentric position of the eye point, and the plurality of conditions are assigned importance levels by ranking and / or weighting, and the importance levels can be changed. One of the conditions determined is that the calculated lens edge thickness calculated from the order data exceeds the thickness of the semi-finished lens along the lens shape data laid out on the semi-finished lens. The amount is within a set value, and is related to reduction of uncut material.

  In the present invention, the most advantageous position in terms of a plurality of set conditions is selected for the eccentric position of the eye point. Therefore, there is an effect that many purposes can be achieved in a state suitable for each order data.

It is a block diagram which shows the spectacle lens processing system which concerns on this invention. It is a flowchart which shows the spectacle lens processing method which concerns on this invention. It is a flowchart which shows the detailed example of the process calculation process of FIG. It is a figure which shows an example of order data and a target lens edge thickness. It is a figure which shows another example of order data and a target lens edge thickness. It is a figure which shows the round lens and target lens layout after (a) eccentricity and (b) eccentricity with respect to the order data of FIG. It is a figure which shows another example of order data and a target lens edge thickness. FIG. 7A is a lens layout diagram before eccentricity, FIG. 7B is an explanatory diagram of a central section before eccentricity, FIG. 7C is an explanatory diagram of a lens layout after eccentricity, and FIG. 7D is an explanatory diagram of central section after eccentricity. is there. It is a figure which shows another example of order data and a target lens edge thickness. It is a figure which shows the round lens and target lens layout after (a) eccentricity and (b) eccentricity with respect to the order data of FIG. It is a figure which shows another example of order data and a target lens edge thickness. (A) no eccentricity, (b) nose side 1.0 mm eccentricity, (c) 2.0 mm eccentricity, (d) 3.0 mm eccentricity, (e) 4.0 mm eccentricity, (f) 5 It is a figure which shows a round lens and target lens layout of 0.0 mm eccentricity and (g) 6.0 mm eccentricity. It is a figure which shows another example of order data and a target lens edge thickness. It is a figure which shows the round lens and target lens layout after (a) eccentricity and (b) eccentricity with respect to the order data of FIG. It is explanatory drawing which shows typically the relationship between the back surface process and eccentricity in an internal surface progressive-power lens.

  Hereinafter, an example of an embodiment according to the present invention will be described with reference to the drawings as appropriate. In addition, the form of this invention is not limited to these examples.

≪Overall structure etc.≫
FIG. 1 is a block diagram showing a spectacle lens processing system 1 according to the present invention. The spectacle lens processing system 1 includes a plurality of ordering terminals 2 (data transmission devices) arranged for each spectacle store, etc. A frame reader 3 connected to the ordering terminal 2 and a receiving terminal 4 arranged in a lens maker or the like that is communicably connected to each ordering terminal 2 via the Internet INT as an example of a network. (Data receiving device), a control terminal 5 in a lens maker or the like connected to the receiving terminal 4, and a semi-finished lens (semi-semi-finished product) controlled by the control terminal 5 as a round lens A processing machine 6 that processes the round lens, a surface processing machine 8 that performs surface treatment on the round lens, and a bead processing machine 9 that processes the round lens. Various terminals are constituted by computers. The various terminals may be server computers.

  FIG. 2 is a flowchart showing a spectacle lens processing method that can be performed by the spectacle lens processing system 1, and the spectacle lens processing method is roughly divided into an ordering step S1, an order receiving step S2, a processing calculation start step S3, and a processing calculation step S4. , Semi-selection step S5, semi-set step S6, semi-processing step S7, surface treatment step S8, target lens processing step S9, and shipping step S10.

≪Ordering terminal etc.≫
Control means (not shown) for executing a program in each ordering terminal 2 (CPU and the like; hereinafter described as the operation of the terminal) will appropriately execute the following processing. The program is stored in a storage unit (memory, various disks, etc.) not shown, and is sequentially read and executed by the control unit.

  Each ordering terminal 2 accepts input of various prescription data exemplified below by input means (keyboard, pointing device, etc.) not shown, and stores them in the storage means. Here, in principle, the single focus lens will be described, and the other lenses will be mainly described last. That is, the product name of the lens and its specific material refractive index, whether or not dyeing is specified or specified, color, spherical power (S power), cylindrical power (C power), astigmatism axis AX, frame type and shape , The vertical and horizontal displacement distances of EP (eye point, pupil position when wearing glasses) starting from the boxing center. The boxing center is the center of an upright rectangle that circumscribes the frame of one eye of the frame.

  Each ordering terminal 2 can capture and store the lens shape data of the spectacle frame measured by the frame reader 3. Here, the target lens shape data is a set of lengths up to the spectacle frame in a predetermined number (24) of radiation at a predetermined angular interval centered on the boxing center, and is in a clockwise order from the radiation extending vertically upward. Yes. Note that the target lens shape data may be a set of coordinate values (X, Y) on the XY plane with EP as the origin. Further, the ordering terminal 2 and the frame reader 3 may be integrated, for example, by incorporating the ordering terminal 2 into the frame reader 3.

  When each ordering terminal 2 receives a predetermined input (such as pressing an ordering button on the screen of the display means), the receiving terminal receives the prescription data and target lens shape data (order data) input and stored. It transmits to the machine 4 (ordering process S1). When each ordering terminal 2 confirms (simplely) that the order data is (apparently) unprocessable at the time of placing an order, it displays a process for not placing (not accepting) the order and a message to that effect. Processing may be performed. Further, the order data may be input to the control terminal 5 or the processing machine 6 through the manufacturer's frame reader or directly by the input means. Further, the lens shape data is not included in the order data, but instead, the type of round lens described later (the diameter of the round lens and the amount of eccentricity, the value of the surface curve / back surface curve, etc.) can be included.

≪Reception terminal etc.≫
The receiving terminal 4 stores the order data (prescription data / lens shape data) received via the Internet INT in its storage means (order receiving step S2). Further, the receiving terminal 4 determines whether or not a predetermined condition is satisfied with respect to specific order data, such as arrival of processing order (reception order, etc.), arrival of a predetermined time, or pressing of a processing button that has selected the order data. Then, in order to execute the processing of the spectacle lens based on the order data, the order data is transferred to the control terminal 5 (processing operation start step S3). The receiving terminal 4 may immediately transfer the order data to the control terminal 5, and the control terminal 5 may execute the processing calculation start step S3. Further, at least any two of the reception terminal 4, the control terminal 5, and the processing machine 6 may be combined together.

≪Control terminal etc.≫
The control terminal 5 executes a program (eyeglass lens processing program) stored in its storage means by its control means, and performs the following processing. In other words, when receiving the order data from the receiving terminal 4, the control terminal 5 stores the order data in the storage means and executes processing data processing for spectacle lens processing according to the order data. (Processing calculation step S4). As will be described in detail later, this calculation determines whether or not to perform eccentric machining in order to appropriately realize a plurality of purposes (multipurpose) (considering a plurality of conditions), and in what direction, if any. Judgment and calculation (condition determination) of whether or not eccentricity is performed. Here, the decentering is regarded as a deviation of the EP from the geometric center of the round lens described later.

  Then, after calculating the processing data, the control terminal 5 extracts a corresponding type of cicada from the stocker 7 which is an automatic warehouse by a chuck (not shown) (semi-selection step S5) and sets it in the processing machine 6 ( Semi-setting step S6). The setting to the processing machine 6 is performed with no inclination with respect to a cutter (not shown) or in a state having a predetermined inclination (eccentric state) according to the processing data. The control terminal 5 may display the type and eccentricity by display means (various displays, printers, etc.), and the type of extraction and / or setting to the processing machine 6 is based on the display. Can be done manually (manually).

  Semi (Semi-Finished Lens / Semi-Finished Blank) is suitable for prescription in a range where one surface (here, surface / convex surface) is the final optical surface relating to a spherical surface and the other surface (here, back surface / concave surface) is present. By forming the back side according to the order data, the front side or the back side is processed into a round lens before processing the target lens having a predetermined curve. That is, after processing the target lens shape, the lens is processed into a round lens having each curve that has the shape or relative position of the surface curve / back surface curve as ordered.

  Cicada types can be provided for each surface curve (used frequently), for example, for each diameter, center thickness, back surface curve, and material. The number of types depends on the balance between the increase in volume, program complexity, semi-manufacturing costs, etc., and the reduction in processing costs (discarded parts, processing time, etc. during backside processing and target lens processing). It can be set so as to approach the optimum according to. For example, if a cicada with an extremely large center thickness is prepared, orders with thick or thin centers can be handled by backside processing, so the number of cicada types can be reduced, management costs are reduced, but processing time is reduced. Since the processing cost increases due to an increase in the processing wrinkles, the types are classified according to a plurality of thicknesses frequently used for each surface curve.

  Further, when the semi is set in the processing machine 6, the control terminal 5 executes the control of the processing machine 6 according to the processing data, and executes the processing from the semi to the round lens as described above (semi Processing step S7). Furthermore, the control terminal 5 causes the surface treatment machine 8 that performs various treatments on the surface of the round lens to receive the round lens and perform the treatment (surface treatment step S8). Examples of the surface treatment include dyeing, scratch-preventing hard coat, formation of an antireflection film, or a combination thereof. The surface treatment may be controlled by a terminal different from the control terminal 5, or a plurality of surface treatment machines 8 corresponding to the type of surface treatment may be used. Further, in the case of order data indicating no surface treatment, the surface treatment step S8 may be omitted.

  Thereafter, the control terminal 5 gives an instruction to send the round lens to the target lens shaper 9, and performs target shape processing in a shape corresponding to the target lens shape data in the arrangement based on the processing data (target lens processing step S9). ). In the target lens shape processing, various arrow strings can be processed, and the arrangement of the arrow strings in the thickness (edge) around the target lens shape is calculated and included in the processing data. An arrow string (easily placed in a spectacle frame) may be formed. In addition, the target lens shape processing and the calculation thereof may be executed in another terminal or processing machine. Further, the target lens shape processing may be performed not on the control terminal 5 side (manufacturer) but on the ordering terminal 2 side (glasses store or the like). The processing machine 9 may be omitted.

  The spectacle lens processed in accordance with the order data in this way is shipped by delivery to a spectacle store or the like where the ordering terminal 2 is located after inspection (shipment process S10).

≪Avoiding situations where machining is not possible≫
Next, the details of the machining operation step S4 will be mainly described below for each purpose. The control terminal 5 applies the processing for each purpose in parallel based on a predetermined reference order, priority, etc., and calculates an optimum eccentric position. The reference order can be changed as appropriate according to the ordering status, etc., and the eccentric position can be calculated by executing any one of the processes for each purpose. In the following, the semi-surface (object-side surface) is the final optical surface and is not processed when forming a round lens, and the semi-back surface (eye-side surface) is processed when forming a round lens. Although the semi-back surface is the final optical surface and the semi-finished surface is processed, it can be operated in the same manner as below, and the semi-front and back surfaces are both processed. It can operate in the same way as the following.

  First, if a round lens is formed without decentering and the target lens is processed, the processing for the purpose of enabling the processing by decentering (avoiding the situation where processing is impossible) is performed. This will be described with reference to FIG.

  The control terminal 5 that has received the order data shown below first obtains the minimum value of the semi-diameter that can lay out the lens shape data when there is no eccentricity (no eccentricity necessary diameter calculation process S11). The calculated value is appropriately stored in the storage means (the same applies hereinafter).

  As for order data, the material refractive index is 1.6, the power is S + 9.00D (diopter), the target lens shape data is shown in FIG. 4 (× is EP), and the target lens minimum edge thickness is 1.2 mm. In FIG. 4, the numbers displayed in the vicinity of the edge of the target lens shape are the calculationally clear border thickness that is not included in the order data (those obtained by multiplying the value obtained in millimeters (mm) by 10). It is.

  When the control terminal 5 is not decentered, the target lens shape that is farthest from the EP when the target lens shape data is laid out with the geometrical center of the EP and the semi- geometrical center (when the target lens shape data layout is taken into consideration) is used. By calculating the dimensions up to the edge of the shape, the required diameter of the semi is calculated as 68 mm.

  Further, the control terminal 5 recognizes from the database (not shown) in the storage means that the standard curve of the surface that is usually most likely to meet the frequency S + 9.00D is the real curve (surface refractive power) 12.2. .2 curve semi is the largest at every 5mm diameter, but only 65mm, and similar to the curves of real curve 10.3 and real curve 9.2 which are similar to the curve, the diameter of 70mm exceeding 68mm It is determined from the database that the semi-similar curve that is close to the curve is the real curve 8.0 semi (semi-type grasping process S12).

  The control terminal 5 calculates the back curve when the frequency of the order data is covered with a 70 mm diameter 8.0 curve semi, which can be machined without eccentricity (non-eccentric machining data calculation processing S13). Then, it turns out that the power cannot be secured unless the double lens has a convex back surface. Therefore, in this semi, processing becomes impossible because the back surface is convex (No in processing availability determination processing S14). Note that unlike the present embodiment, when the surface is processed, the surface becomes concave and the processing is not possible.

  Therefore, in order to enable processing even with a 65 mm diameter 12.2 curve semi, the EP is decentered to the nose side where the distance between the lens edge and the round lens edge is the longest (after setting the condition to the 12.2 curve in the condition selection setting process S16) The eccentricity calculation process S17). Here, it is not determined that the limit (the limit such as the curve value or the eccentricity) has been exceeded (No in the limit excess determination process S15). The limit is set to a value that limits the range of calculation or calculation, and prevents excessive eccentricity, calculation of machining data, and prolonged calculation time. If the limit is exceeded, an error message is displayed and the process is interrupted. Etc., error processing S18 is performed.

  The control terminal 5 shifts the amount of eccentricity (the amount of eccentricity) by a predetermined amount (for example, 0.2 mm, determined from the balance between processing efficiency and accuracy, etc.), and performs the layout at each eccentric position (the ball). In consideration of the layout of the mold shape data), it is determined whether the lens according to the order data can be taken without exceeding the semi-outer diameter and whether the back surface is not convex (processing availability determination process S14).

  Then, it is understood that if the eccentricity is 2.2 mm to the nose side, it is advantageous on the condition that the back surface is concave and the lens according to the order data can be processed, and the back surface can be processed without being convex (EP thickness) 9.3 mm, Yes in processing availability determination processing S14). Further, there is no need to further explore the possibility of a better condition for the semi and layout whose surface is a standard curve according to the frequency and can be processed (No in the additional condition search determination process S19). Note that the edge shape thickness is the edge thickness shown in FIG. 4, and corresponds to the designation of the minimum edge shape thickness of 1.2 mm in the order data. Further, the round lens minimum edge thickness is secured to a predetermined value or more (refer to improvement of edge blur described later).

  Therefore, the control terminal 5 selects this layout as the most advantageous processing data on condition, and stores it in the storage means (processing data storage processing S20). Further, in this case, a back surface curve value is calculated so that the frequency is in accordance with the order data, and stored as processing data (processing data storage processing S20). It should be noted that the calculation order (whether the diameter is given priority or the curve is given priority) can be changed as appropriate according to the order status, assortment, and the like.

  Subsequently, the control terminal 5 calculates or stores a machining semi-tilt angle (P angle) for eccentric machining (eccentric machining data processing S21). As a single focus lens, when the back surface curve is drawn so that the prism amount (prism diopter, Δ) is 0 in EP, the prism amount at the geometric center is obtained, and the P angle at which the prism amount is given is obtained. Ask.

  In other words, when the back curve is simply moved horizontally in a predetermined direction and distance (EP direction and distance eccentric from the semi-geometric center), the back curve portion on the EP side from the geometric center becomes a surface curve (spherical surface). On the other hand, the amount of prism related to the portion is too short, the amount of prism in EP is not zero, and the back curve portion on the opposite side of EP from the geometric center is far from the surface curve. Since the amount of prisms related to the portion becomes excessive, the back surface curve is further inclined by a predetermined angle to increase the amount of prisms on the EP side from the geometric center, the prism amount at EP is set to 0, and The amount of prisms on the opposite side is reduced, and the amount of prisms centered on EP is returned to the same as in the case of no eccentricity. Since the surface curve is a spherical surface, it is possible to return the prism amount by giving a slope of a predetermined angle while maintaining the shape of the back surface curve, and the predetermined angle at this time is the P angle. In other words, even if the back curve is rotated by a predetermined angle around the center point of a sphere whose surface curve is a sphere, the positional relationship of the back curve with respect to the surface curve is unchanged, and the amount of prism is 0 in EP. The angle when rotated and moved in this way is the P angle.

  The control terminal 5 obtains machining data related to the operation of the cutter for machining the back surface curve when EP is coincident with the geometric center, and obtains the degree of tilting the semi corresponding to the eccentric amount, that is, the P angle, If the semi-back surface tilted by the P angle is polished by the operation of the cutter, a round lens corresponding to the order data is formed on the target lens shape layout.

The relationship between the prism amount at the geometric center and the eccentric distance is approximately as shown in the following formula 1 (Prentice formula), and the relationship between the prism amount and the P angle is as shown in the following formula 2, Thus, the P angle is calculated from the prism amount at the geometric center. The control terminal 5 stores the calculated P angle as machining data (S21). Note that π is the circumference ratio. Further, even when the eccentricity is unnecessary and the prism is specified in the order data, the P angle can be obtained by applying the prism amount specified in these equations. Furthermore, when the prism is specified and decentration is required, the P angle corresponding to both can be obtained by combining the two.
Prism amount [Δ] = 0.1 × Frequency [D] × Eccentric distance [mm] Expression 1
P angle [degree] = 0.01 × prism amount [Δ] / (semi-material refractive index−1) × 180 / π Formula 2

  When the machining data is calculated in this way, the control terminal 5 instructs the stocker 7 to pick up a 12.2 curve semi with a 65 mm diameter (semi-selection step S5), and notifies the stocker 7 of the P angle. The hand (not shown) is fixed to the processing machine 6 with the 12.2 curve cicada tilted by the notified P angle (semi-set step S6). Then, the control terminal 5 controls the processing machine 6 based on the processing data and polishes the back surface curve (semi-processing step S7). After the polishing is completed, the surface treatment machine 8 is appropriately subjected to surface treatment (surface treatment step S8), and an erasable mark is given to the EP, and the cutter is moved according to the target lens layout in the processing data based on the mark. The target lens processing machine 9 is controlled to perform target lens processing on the round lens (target lens processing step S9). By processing from a semi lens to a round lens or a target lens shape, a spectacle lens that matches the order data is actually formed. It is also possible for the manufacturer to perform the surface treatment step S8 (and EP marking), ship the round lens, and process the target lens shape at a spectacle store or the like.

≪Improvement of flickering, material saving, etc.≫
The control terminal 5 receives the material refractive index 1.6, the power (with astigmatism) S + 2.00D, C + 2.00D, AX180, and the order data including the target lens shape data and the EP position in FIG. Note that the edge shape thickness shown in FIG. 5 as in FIG. 4 is not included in the order data.

  Then, the control terminal 5 calculates the minimum value of the semi-diameter when it is not eccentric as 69 mm (no eccentric necessary diameter calculation process S11), and the surface curve suitable for the frequency is a semi-real curve 6.0, The actual semi-diameter that can cover 69 mm is calculated to be 70 mm (semi-type grasping process S12), and the back curve at this time is a real curve that becomes an astigmatic surface of 2.0 and 4.0 curves. And the frequency (no eccentric machining data calculation process S13). In this case, the center thickness of the real curve 6.0 used in this case at the semi is 5.0 mm, and the back curve is the real curve 5.3.

  The terminal 5 for control calculates | requires the border thickness (before shape processing) of a 70 mm diameter round lens in the case of not decentering from a back surface curve (no eccentric processing data calculation process S13). Then, it is calculated that the minimum border thickness in the vertical direction at the time of the lens layout is −1.0 mm, and it is understood that if the back surface is polished as it is, the border of the round lens is missing (a border thickness of 0 or less). The black area in FIG. 6 (a) where the periphery of the portion is missing. Such round lens flickering is not preferable because it causes damage to the processing machine 6 and makes semi-processing impossible or breakable. It is also possible to reduce the edge portion by reducing the diameter of the cicada to 69 mm (reducing the minimum edge thickness of the round lens to -0.9 mm), but reducing the cicada diameter by cutting the periphery of the cicada Processing is required, and the semi-diameter has a special size, so that it is difficult to automatically convey and is inferior in portability.

  Therefore, it is determined that machining is not possible with no eccentricity (No in S14 and S15), whether or not the diameter is reduced due to eccentricity in the semi of 5.2 curve, the lens shape data, each curve value (semi-thickness), etc. To calculate sequentially (eccentricity calculation processing S17). For example, the required diameter in the case of decentering by 0.2 mm (predetermined set value) on the nose side without up-down eccentricity is calculated sequentially as long as it decreases from the previous time, and decentered by 0.2 mm (predetermined set value) in the same way calculate. Note that the calculation to the ear side and the calculation to the upper side may be performed in the same manner, or the calculation may be performed by determining which side is decentered from the distribution state, frequency, etc. of the target lens shape data. For example, with respect to the eccentric direction, first, the EP position when the round lens diameter can be minimized with the target lens shape laid out may be calculated and set on the line connecting the EP position and the EP when there is no eccentricity. Also, in order to determine the range of eccentricity (in order to define the eccentric point as finite and to calculate the processing data at each eccentric position as a practical finite range), when the target lens shape data protrudes from the round lens, Eccentricity can be performed within a range where machining is not impossible, such as stopping a larger eccentricity in the direction.

  Then, it is calculated that the required diameter is 58 mm with the eccentricity of 5.4 mm on the nose side and 0.4 mm on the lower side (FIG. 6B, EP thickness 3.0 mm), which is most advantageous in terms of material saving conditions. The eccentric position and the like are selected and stored (Yes in S14 and S19). The P angle at this time is calculated to be 2.4 degrees by the calculation as described above (eccentric machining data processing S21). In addition, the diameter of 60 mm is selected for the semi, but if the edge thickness of the round lens is recalculated with a diameter of 60 mm, the minimum is about 0 mm, and there is still a possibility of the occurrence of the edge (but the possibility of the edge) It is judged that it is advantageous in terms of the reduction of flickering due to its low height), so that the outer periphery of the semi is sharpened to make sure the diameter is 58 mm, and then the target lens shape is processed. Execution of such semi-diameters and peripheral cutting is also included in the machining data (machining data storage process S20). It is also possible to prepare a semi having a diameter of 58 mm. Various processes are performed as described above.

  By reducing the diameter of the cicada by eccentricity in this way, it is possible to reduce or prevent round lens flickering, protect the cicada and the processing machine 6, and prevent processing inability and processing failure. . Furthermore, if the diameter and thickness of the cicada used decrease, the cicada volume used (total amount) will decrease, and the cicada removed by backside polishing and target lens processing will decrease accordingly, saving materials. In particular, when a highly functional material such as a high refractive index material is used, the cost is greatly reduced.

  In addition, for 10,000 order data, when the total volume of semi-volumes obtained from the required size when the EP is centered on the geometric center without any eccentricity, and as mentioned above, the semi-volume is saved by eccentric processing. Comparing the total semi-volumes obtained from the required size, the semi-volume of the eccentric processing was reduced by 15% compared to that without the eccentricity.

≪Reduction of uncut material, reverse eccentricity, etc.≫
The control terminal 5 that has received the order data including the material refractive index 1.6, the power S-12.00D (negative intensity lens, concave lens) and the target lens shape data and the EP position (excluding the border thickness) of FIG. Then, the minimum value of the semi-diameter when there is no eccentricity is calculated as 65 mm (S11), and it is calculated that the surface curve suitable for the frequency is a semi of the real curve 1.2 (S12). The curve 13.2 is calculated from the surface curve and the frequency (S13), and it is grasped that the actual semi-diameter is 65 mm (S12). The semi-back curve used here is a real curve 9.5.

  Further, in the case of no eccentricity, the control terminal 5 has a shortage of a maximum of 1.4 mm in the lens edge thickness on the ear side (the thickness of the round lens along the lens shape is ensured to be calculated on the order data). It is grasped by calculation that it is smaller than the calculated target lens edge thickness by a maximum of 1.4 mm (S13). In the case of a negative-strength lens, since the edge is chamfered after processing the target lens shape, a slight thickness deficiency (left uncut, for example, about 0.5 mm) is allowed. Cannot be done (No in S14). In addition, it is a part of 5-6 mm from the ear | edge side edge that becomes semi-thick. FIG. 8A shows a case where there is no eccentricity. The thick circles in the semi-outer edge in the figure are the contour lines where the semi-thickness is insufficient. FIG. 8B shows a central cross-sectional view. In the figure, the solid line is a semi, and the broken line is a spectacle lens.

  Therefore, the control terminal 5 determines to decenter to the ear side (normal eccentricity to the nose side and reverse / reverse eccentricity) in order to eliminate the shortage of the semi-thickness by increasing the semi-thickness of the semi. (S16). When the reverse eccentricity is increased by a predetermined amount, the required eccentric diameter is calculated to be 68 mm with a reverse eccentricity of 2.0 mm, and the semi-diameter is increased by one step (70 mm) (FIGS. 8C and 8D). )), The lack of the edge of the target lens shape (remaining shavings) is reduced to the ear side 0.3mm and the nose side 0.1mm to the extent that there is no problem with chamfering. The eccentric position or the like is selected (Yes in S17, S14, S19). Then, the P angle is calculated to be 2.4 degrees (S21), and the EP thickness is 1.3 mm (standard value).

  In addition, since the part removed at the time of processing increases by increasing the semi, the material is expensive, or even if the required diameter is small, the remaining part of the shaving is within a sufficiently small range considering chamfering. In consideration of the matter, it can be set in the condition selection setting process S <b> 16 so that the priority is given to material reduction.

≪Material saving etc.≫
The control terminal 5 that has received the material refractive index 1.6, the power S-2.00D and the order data including the target lens shape data and the EP position (excluding the border thickness) of FIG. Is calculated to be 75 mm (S11), the actual semi-diameter is 75 mm, and the normal surface curve that matches the power is a real curve 4.6 semi (thinnest semi-center thickness) 4.8 mm · S12), the fact that the back curve at this time becomes a real curve 6.6 is calculated from the surface curve and the frequency (S13). The semi-back curve used here is a real curve 4.5.

  The control terminal 5 grasps that there is no disadvantage such as insufficient semi-thickness or occurrence of flickering even if it is processed without eccentricity as it is (FIG. 10 (a)), but EP is on the nose side in the target lens shape. Understand that there is a possibility of reducing the removal part (saving material) as a smaller semi-diameter if it is eccentric to the nose side due to the large distance to the ear side edge (additional condition search judgment processing) Yes in S19), the eccentric to the nasal side is attempted (S16).

  The control terminal 5 repeats the eccentricity of the EP for each predetermined value on the nose side and the calculation with the EP (S17), and can be processed with a semi-diameter of 60 mm with an eccentricity of 7.5 mm on the nose side (diameter reduced by 15 mm). ) To obtain an advantageous calculation result (FIG. 10 (b), memorized in S20, EP thickness 1.3 mm), selecting the eccentric position, and the result that the P angle at this time is 1.60 (S21).

≪Securing the target etc.≫
In the case where the order data is the same as the material saving example explained immediately above, when the diameter type in the 4.6 curve semi-thickness with sufficient thickness is prepared in 75, 70, 65 mm, the required diameter is 65 mm with an eccentricity of 5.0 mm on the nose side.・ P angle is 1.10, and a semi of 65mm can be used. From the viewpoint of saving material, no more eccentric amount is required, but if it is further eccentric by 1 to 2.5mm (S17 or S19), processing variation It is possible to avoid the optical center misalignment failure due to the above, and a target lens shape is secured. In other words, securing the target lens shape prevents the target lens shape from being removed depending on the variation when taking into account processing variations such as optical center misalignment. It is decentered more than necessary, and is unique to a single focus lens. It should be noted that further eccentricity can be prevented when the processing conditions such as fracturing and uncut material are deteriorated.

≪Multipurpose consideration, etc. (1) ≫
Next, an example will be described in which the purposes considered in each of the above-described machining data calculations are applied in combination. The purpose here is mainly to improve edge cracking, reduce uncut material and save materials.

  Note that which objectives are considered in a superimposed manner and which objectives are emphasized can be variously adjusted / changed depending on the order status. The calculation of the importance of the objective is to calculate the score and / or losing points according to the ranking of the objectives and the situation of the data considered for the objective, and adopt the machining data with the highest total score, or the score It can be executed by weighting a goal or a goal. The ranking and importance (scores / missing points / weighting values), etc. are stored in the storage means in the form of a database, etc., and the rank etc. are calculated by the purpose application determining means referring to the database in the control means of the control terminal 5 Furthermore, machining data (eccentric position) to be adopted can be determined.

  Here, exemplifying a method for ranking a preferred purpose or selecting an optimum condition is to consider avoidance of a situation in which processing cannot be performed with the highest priority, and then consider improvement of flickering or reduction of uncut material, followed by semi-volume saving (material Saving), then securing the target lens shape, and then ranking or weighting so that the P angle does not exceed a predetermined value (the P angle does not become too large). In addition, you may comprise ranking etc. except one or more objectives from this ranking etc. In addition, the tolerance of margins and uncut parts is that the edge of the round lens is likely to remain due to the performance of the processing machine 6 such as whether the other parts can be processed neatly even if a margin occurs, or due to processing variations, or semi-thick Depending on factors such as variations, semi-processing variations or chamfering during bead processing, uncut parts will not be a problem, and what kind of semi-preparation is available, the priority of oneself and each other will change. It is preferable to do.

  In addition, for selection, order, weighting, etc. of the purpose, input of a check to the check box provided for each purpose is accepted (the purpose is not applied without checking, the order or priority is lowered, etc.) ), And can be set by accepting input of numbers in the input boxes provided for each purpose (numbers indicating ranks, numbers indicating weighting ratios, etc.). ) Stored in the storage means.

  Material refractive index 1.6, power S + 1.00D, target lens shape data in FIG. 11 (excluding each border thickness), EP position (indicated by a black circle near the radiation center in FIG. 11), prism base-in (thick nose side) The control terminal 5 that has received the order data including 8.0P, target lens shape minimum thickness 1.0mm specification, and real curve 4.6 specification calculates the minimum value of the semi-diameter when it is not eccentric as 61mm. (S11) The actual semi-diameter is 65 mm, and it is calculated that the semi-center with the thickest center thickness of 6.7 mm is selected in the 4.6 curve (S12), and the back curve at this time becomes the real curve 3.6. This is calculated from the surface curve and the frequency (S13). The semi-back curve used at this time is a real curve 7.1. The diameter of 4.6 curve semi is a variation of 60, 65, 70, 75 mm.

  The control terminal 5 is decentered by a predetermined value (here, 1.0 mm for simplification) toward the nose side, and machining data at each eccentric position is calculated as shown in [Table 1] below. (S16, S17).

  The control terminal 5 knows that the required diameter is minimum at an eccentricity of 1.0 mm, and a semi-cutter of 60 mm can be used. However, in this case, it is also calculated that the semi-thickness is largely insufficient on the nose side. Therefore, the control terminal 5 tries further eccentricity beyond the eccentric position where the semi-diameter is minimum.

  When the control terminal 5 is decentered by 2.0 mm or more, the control terminal 5 recognizes that the edge thickness of the round lens is reduced. In this case, in order to make the processing easier and safer, the semi is cut to the production diameter and then processed. The smaller the difference between the semi-diameter and the production diameter, the less time is required for processing the production diameter.

  Then, in the eccentricity calculation process S17, the control terminal 5 determines that 4.0 mm eccentricity is the optimum condition that is most advantageous for a plurality of purposes, and selects machining data related to this eccentricity. In other words, with a 4.0 mm eccentricity, the semi-diameter used is not minimum and the material can not be saved at the highest level, but the second smallest diameter can be used, there is no uncut residue, and the flickering is within the allowable range (predetermined threshold value) It is found by comprehensive judgment that portability is good. If emphasis is placed on securing the edge thickness of a round lens (ensuring the ease of processing from semi to edging) rather than portability, 3.0 mm eccentricity may be selected as the optimum.

≪Multipurpose consideration, etc. (2) ≫
Another example in which the purpose is considered in combination will be described. The purpose here is mainly to improve flickering and improve processing conditions.

  Material refractive index 1.6, frequency S + 2.00D, C + 1.00D, AX180, prism base down (thickening the lower side) 3.0P, target lens shape data (excluding border thickness) and EP position (center) The control terminal 5 that has received the order data including the nearest black circle), the minimum edge thickness 1.2 mm designation, and the real curve 3.2 designation calculates the required semi-diameter 59 mm when it is not eccentric (S 11). In this case, the actual semi-diameter is 60 mm, and it is calculated to select a semi with a center thickness of 5.0 mm in the 3.2 curve (S12), and the back curve at this time is a real curve of 1.2 curve and 0 (2) An astigmatism surface of 2 curves is calculated from the surface curve and the frequency (S13). The semi-back curve used here is a real curve 5.6. Also, the diameter of the 3.2 curve semi is a variation of 60, 65, 70, 75 mm.

  When there is no eccentricity, the control terminal 5 recognizes that the minimum edge thickness is −0.8 mm on the upper side and the upper side of the round lens is edged (FIG. 14A). In this case, the P angle for applying the prism according to the order data is calculated as 2.9 degrees (the same calculation as the calculation of the P angle in S21 is performed in S13).

  Further, the control terminal 5 grasps from the target lens shape data and the geometric center that the target lens shape is approximately equidistant from the geometric center (optical center) on the nose side and the ear side. It is judged that there is no room to reduce the required diameter, and that material savings due to eccentricity cannot be made. Also, it is determined that the vertical direction is the same as the horizontal direction.

  Since the control terminal 5 has a border on the upper side instead of a lower side (the thickness of the upper border becomes negative), the control terminal 5 calculates whether the blur is eliminated by the upward eccentricity with an eccentricity for each predetermined value. Judge repeatedly. And when it is decentered upwards by 10.0 mm (FIG. 14B), the required diameter becomes 67 mm, but the distance from the upper end of the target lens shape to the end of the round lens decreases from 17 mm when there is no eccentricity to 11 mm. The minimum edge thickness of the round lens is determined to be 0.1 mm, and it is determined that the blur is eliminated, and the optimum condition is selected. Also, in this case, the P angle that combines the P angle for providing the prism and the P angle for decentering is 0 degrees, and it can be set without tilting the cutter of the processing machine 6, and the processing conditions are the most It is determined to be advantageous and is taken into account in the selection of optimal conditions.

≪Inner progressive power lens etc.≫
Even in the case of an inner surface progressive-power lens with a spherical surface, the P-angle is obtained in the same way as the above-mentioned single focus lens, and the rear surface shape is created so as to give progressive power instead of processing the back curve (back surface design) Multi-purpose eccentric machining according to the above-mentioned order data can be performed by carrying out numerically controllable processing of a complex free-form surface in the processing machine 6). In this case, the order data includes the addition frequency.

  This point will be described in more detail with reference to FIG. In order to simplify the description, it is assumed that the EP is initially located at the geometric center.

  As shown in (a), without decentration, the back surface of the design that gives progressive power to the surface of the spherical surface (the bottom surface in the figure) can be positioned to produce an inner surface progressive power lens as ordered. Here, in order to execute eccentricity with respect to the geometric center of EP, if simple translation is performed as shown in (b), the arrangement of the back surface with respect to the front surface is shifted (for example, the right side in the figure is too close to the spherical surface), Inappropriate in light of the data. On the other hand, when a predetermined parallel movement and inclination (P angle) are given as shown in (c), it is possible to decenter the surface while making the position of the back surface relative to the surface of the spherical surface appropriate. In (c), the inclination of the back surface at the geometric center becomes horizontal, and the inclination of the back surface at the processing center of the processing machine 6 becomes horizontal, so that the processing conditions can be optimized. Further, in (a) and (c), the distance and angle between the front surface and the back surface in EP and the distribution of prisms centered on EP are the same.

  Even if the surface of the aspherical lens is not spherical, if the amount of the aspherical surface is small or almost zero (for example, a weak aspherical lens), the eccentric processing can be performed in the same manner as the above-mentioned single focus lens. it can.

  As described above, it is possible to carry out decentration processing in consideration of multiple purposes for inner surface progressive addition lenses and some aspheric lenses, and also for eyeglass lenses that require complicated processing. Therefore, it is possible to appropriately achieve at least one of the objectives such as avoiding a situation in which machining is impossible, saving materials, improving machining conditions, improving fluffiness, securing a target shape, and reducing uncut parts. In particular, inner surface progressive addition lenses and some aspherical lenses have a more complicated back surface processing than single focus lenses, so it is possible to avoid processing failures by improving the blurring using eccentric processing and improving processing conditions. The degree of improvement in performance is greater than that of single focus lenses. In addition, the inner surface progressive addition lens and some aspherical lenses often use high-functional and expensive materials from the viewpoint of improving added value, so that the material saving effect is relatively great. .

DESCRIPTION OF SYMBOLS 1 Eyeglass lens processing system 5 Control terminal 6 (Eyeglass lens) processing machine 7 (Semi-finished lens) stocker

Claims (11)

A control terminal that controls a processing machine that forms a round lens for a spectacle lens by processing at least one surface of a semi-finished lens in consideration of a layout of target lens shape data,
Order data including the target lens shape data and eye point can be received;
With the eye point shifted from the geometric center of the semi-finished lens and decentered, processing data relating to the surface of the semi-finished lens according to the order data can be calculated,
Based on the result of calculating the processing data at each position after shifting the eye point in the vertical direction and / or the horizontal direction within a range where the target lens shape data does not protrude from the round lens. Selecting an eccentric position of the eye point that is most advantageous in terms of a plurality of set conditions ,
A plurality of the above conditions are given importance by ranking and / or weighting, and the importance can be changed.
One of the plurality of the set conditions relates to improvement of edge blur, wherein a minimum value of the edge thickness of the round lens after processing is set to a predetermined value or more. Machine. A control terminal that controls a processing machine that forms a round lens for a spectacle lens by processing at least one surface of a semi-finished lens in consideration of a layout of target lens shape data,
Order data including the target lens shape data and eye point can be received;
With the eye point shifted from the geometric center of the semi-finished lens and decentered, processing data relating to the surface of the semi-finished lens according to the order data can be calculated,
Based on the result of calculating the processing data at each position after shifting the eye point in the vertical direction and / or the horizontal direction within a range where the target lens shape data does not protrude from the round lens. Selecting an eccentric position of the eye point that is most advantageous in terms of a plurality of set conditions,
A plurality of the above conditions are given importance by ranking and / or weighting, and the importance can be changed.
One of the set conditions is as follows:
When the surface to be processed in the round lens is an eyeball side surface, avoid the situation where the surface becomes convex and cannot be processed,
Alternatively, when the surface to be processed in the round lens is a surface on the object side, the situation where the surface becomes concave and cannot be processed is avoided.
It is about avoiding the situation where processing is impossible
A control terminal characterized by that. A control terminal that controls a processing machine that forms a round lens for a spectacle lens by processing at least one surface of a semi-finished lens in consideration of a layout of target lens shape data,
Order data including the target lens shape data and eye point can be received;
With the eye point shifted from the geometric center of the semi-finished lens and decentered, processing data relating to the surface of the semi-finished lens according to the order data can be calculated,
Based on the result of calculating the processing data at each position after shifting the eye point in the vertical direction and / or the horizontal direction within a range where the target lens shape data does not protrude from the round lens. Selecting an eccentric position of the eye point that is most advantageous in terms of a plurality of set conditions,
A plurality of the above conditions are given importance by ranking and / or weighting, and the importance can be changed.
One of the plurality of set conditions is a calculated lens edge thickness calculated from the order data with respect to the thickness of the semi-finished lens along the lens shape data laid out on the semi-finished lens. It is related to the reduction of uncut residue that makes the amount exceeding the set value within the set value
A control terminal characterized by that. A control terminal that controls a processing machine that forms a round lens for a spectacle lens by processing at least one surface of a semi-finished lens in consideration of a layout of target lens shape data,
Order data including the target lens shape data and eye point can be received;
With the eye point shifted from the geometric center of the semi-finished lens and decentered, processing data relating to the surface of the semi-finished lens according to the order data can be calculated,
The eye point is shifted by a predetermined set value in the vertical direction and / or the horizontal direction in a state in which the target lens shape data includes those that are on the ear side from the geometric center in a range in which the round lens does not protrude. Based on the result of calculating the machining data at each position, the most advantageous eccentric position of the eye point is selected based on a plurality of set conditions.
A control terminal characterized by that. 5. The control terminal according to claim 1, wherein the round lens is an inner surface progressive addition lens. The magnitude of the eccentric position, the control terminal according to any one of claims 1 to claim 5, characterized in that said round lens is greater than the magnitude of the eccentric position that minimizes. An eyeglass lens processing system comprising the control terminal according to any one of claims 1 to 6 . By being executed on a computer,
An eyeglass lens processing program capable of constructing the control terminal according to any one of claims 1 to 6 . A spectacle lens processing method for forming a round lens for spectacle lenses by processing at least one surface of a semi-finished lens in consideration of the layout of target lens shape data,
An order receiving process for receiving order data including the target lens shape data and eye points;
An eccentricity calculation step of calculating processing data related to the surface of the semifinished lens according to the order data in a state where the eyepoint is shifted from the geometric center of the semifinished lens and is decentered,
Based on the result of calculating the processing data at each position after shifting the eye point in the vertical direction and / or the horizontal direction within a range where the target lens shape data does not protrude from the round lens. Te, saw including a condition selected setting step of selecting the eccentric positions of set conditions the most advantageous the eye point,
A plurality of the above conditions are given importance by ranking and / or weighting, and the importance can be changed.
One of the plurality of conditions set is related to eyeglass lens processing in which the minimum value of the edge thickness of the round lens after processing is set to a predetermined value or more. Method. A spectacle lens processing method for forming a round lens for spectacle lenses by processing at least one surface of a semi-finished lens in consideration of the layout of target lens shape data,
An order receiving process for receiving order data including the target lens shape data and eye points;
An eccentricity calculation step of calculating processing data related to the surface of the semifinished lens according to the order data in a state where the eyepoint is shifted from the geometric center of the semifinished lens and is decentered,
Based on the result of calculating the processing data at each position after shifting the eye point in the vertical direction and / or the horizontal direction within a range where the target lens shape data does not protrude from the round lens. A condition selection setting step for selecting an eccentric position of the eye point that is most advantageous in terms of a plurality of set conditions.
Including
A plurality of the above conditions are given importance by ranking and / or weighting, and the importance can be changed.
One of the set conditions is as follows:
When the surface to be processed in the round lens is an eyeball side surface, avoid the situation where the surface becomes convex and cannot be processed,
Alternatively, when the surface to be processed in the round lens is a surface on the object side, the situation where the surface becomes concave and cannot be processed is avoided.
It is about avoiding the situation where processing is impossible
An eyeglass lens processing method characterized by the above. A spectacle lens processing method for forming a round lens for spectacle lenses by processing at least one surface of a semi-finished lens in consideration of the layout of target lens shape data,
An order receiving process for receiving order data including the target lens shape data and eye points;
An eccentricity calculation step of calculating processing data related to the surface of the semifinished lens according to the order data in a state where the eyepoint is shifted from the geometric center of the semifinished lens and is decentered,
Based on the result of calculating the processing data at each position after shifting the eye point in the vertical direction and / or the horizontal direction within a range where the target lens shape data does not protrude from the round lens. A condition selection setting step for selecting an eccentric position of the eye point that is most advantageous in terms of a plurality of set conditions.
Including
A plurality of the above conditions are given importance by ranking and / or weighting, and the importance can be changed.
One of the plurality of set conditions is a calculated lens edge thickness calculated from the order data with respect to the thickness of the semi-finished lens along the lens shape data laid out on the semi-finished lens. It is related to the reduction of uncut residue that makes the amount exceeding the set value within the set value
An eyeglass lens processing method characterized by the above.

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