JP2003053649A - Polishing device for aspherical lens - Google Patents

Abstract

PROBLEM TO BE SOLVED: To simplify a device. SOLUTION: This device is constituted of a polishing table 52, a fixed disc 80 mounted on the polishing table 52 and a holder 70 for rotatably holding a lens mounting means. The lens mounting means has a lens fixing means 40 for fixing a lens 26 for exposure and the fixed disc 80 having a storing recessed part according to the diameter of an aspherical lens. A polishing surface of the aspherical lens stored inside an internal surface of the fixed disc 80 is mounted in a lowered state of the polishing surface. Even if a holding ring for fixing the lens for exposure is not used, the lens 26 can be fixed to the lens mounting means. The structure is simplified and the cost of the polishing device can be reduced according to the simplification. During polishing processing, the polishing surface and the lens mounting means are not in contact with each other.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an aspherical lens polishing apparatus for polishing a lens surface such as an aspherical lens for exposure, which can be applied when a phosphor having a predetermined pattern is formed. Specifically, by configuring the aspherical lens to be housed on the inner surface of the fixed disk, and by configuring the lens mounting means so that the lens polishing surface side of the fixed disk faces the polishing table with a predetermined gap, The polishing apparatus can be simplified.
Further, by fixing the aspherical lens to be polished in the accommodating recess of the fixed disk, the lens fixing means and the fixed disk can be easily centered.

[0002]

2. Description of the Related Art In a cathode ray tube such as a color cathode ray tube (color CRT) used as a monitor for a television receiver or a comparator, R, G, B is formed on the inner surface 12a of the panel 12 of the cathode ray tube 10 as shown in FIG. Of the phosphor layer 14 (1
4R, 14G, 14B) are formed. For example, when an aperture grill (AG) having a stripe shape is used as the color selection mechanism 16, the stripe phosphor layers 14 extending in the vertical scanning direction are formed with a predetermined pitch.

To form the stripe-shaped phosphor layer 14 on the inner surface 12a of the panel, there is a case where an exposure device 20 as shown in FIG. 5 is used. In the case of FIG. 5, the aperture grill 16 itself attached to the panel inner surface 12a is also used as an exposure mask. Then, the light (for example, ultraviolet UV) from the light source 24 for exposure is exposed through the exposure lens 26 and the aperture grill 16 to the photosensitive material or the fluorescent material applied to the inner surface of the panel, as shown in FIG. Multiple phosphor layers (stripes)
14R, 14G, and 14B are formed.

Specifically, the phosphor layer 14 is formed through the processes shown in FIGS. 6 and 7. The following is the phosphor forming process including the carbon layer. First, FIG. 6A
As shown in, the inner surface of the panel is polyvinyl alcohol (P
A resist layer 22a such as VA) is applied, and then
As in B, the area (exposure portion) 22b where the R phosphor layer is formed is exposed using the aperture grill 16. Similarly, in this example, while the light source 24 is displaced by a predetermined pitch as shown by the broken line, the regions where the G and B phosphor layers are formed are exposed (FIG. 6C). After that, the substrate is washed with water and then the non-exposed portion 22c is removed to leave only the exposed portion 22b (FIG. 6D).

Thereafter, a carbon layer is applied and dried, and then only PVA is washed with a chemical solution.
The stripe layer 14C having the above structure is obtained. This is a carbon stripe layer (carbon layer). Next, after applying the R (or B) phosphor, the phosphor is exposed using the aperture grill 16 and then washed with water to remove the phosphor in the unexposed portion (FIG. 7).
B). By performing this process on G and B as well, the phosphor layer 14 as shown in FIG. 7C can be formed.

Here, the light from the light source 24 is so arranged that the light from the light source 24 follows the same optical path and reaches the exposure processing layer so that the electron beam passes through the aperture grill 16 and is irradiated on the predetermined phosphor layer 14. An exposure lens 26 as shown in FIG. 8 is used for changing the optical path between the aperture grill 16 and the aperture grill 16. Here, the exposure treatment layer means the above-mentioned resist layer or phosphor layer.

The exposure lens 26 is a combination of several to 7 to 8 lenses. Exposure lens 2
6 is a combination of a flat lens and an aspherical lens. Therefore, the exposure lens 26 is mounted and fixed to the lens mounting case 32 that constitutes the exposure lens device 30 as shown in FIG. FIG. 8 shows a case where the exposure lens device 30 is configured by using three exposure lenses 26a, 26b, and 26c, as will be described later.

When mounting and fixing the lens, it is necessary to mount and fix the exposure lens 26 so that the optical axis of the exposure lens 26 is completely aligned with the central axis of the mounting housing 32.

Therefore, as the exposure lens 26, one having a reference surface 28 used as an orientation flat as shown in FIG. 9 is used. This reference surface 28 is also used as a reference surface when the exposure lens 26 is attached to a polishing table when polishing it into a predetermined aspherical body. Further, as shown in FIG. 10, a plurality of marking lines 27 are engraved on the peripheral surface of the exposure lens 26 in order to align the lens when mounting the lens on the lens mounting case 32. .

The exposure lens 26 is used by stacking a plurality of lenses. Exposure lens device 30 shown in FIG.
Is mounted on the mounting housing 32 and has three exposure lenses 26a, 26a.
The case where b and 26c are attached and used is shown. Therefore, as shown in FIG. 7, the mounting housing 32 is provided with a central hole 32a and three mounting recesses 34, 36, 38 having different inner diameters are provided in the central axial direction.

The inner shape of each of the mounting recesses 34, 36, 38 is the same as the outer shape of the exposure lens 26, and the optical axis of the exposure lens 26 is the same as the mounting case 32.
In order to enable mounting so as to be completely aligned with the central axis z, the marking lines similar to the marking line 27 are engraved on the peripheral surfaces of the mounting recesses 34, 36, 38. For example, in the mounting recess 34, as shown in FIG.
The marking line 35 (3, which is used as a reference line by holding a 90 ° angular interval on the step plane 34a which is also the placement surface of b.
5a, 35b, 35c) are engraved. Similar marking lines (not shown) are also formed in the other mounting recesses 36 and 38.

[0012]

The exposure lens 26, which is an aspherical lens, may be manufactured as shown in FIG. In this example, a highly accurate curved surface 23a having the same curved surface shape as the aspherical lens is formed on the surface of a mold (male) 23 made of a metal material such as SUS.

An exposure lens 26 made of quartz glass or the like is placed using the mold 23 (see FIG. 12A). Both surfaces of the exposure lens 26 are flat. The exposure lens 26 is heat-treated in the mounted state. The heating temperature is about 500 ° C.

When the exposure lens 26 is heated, the flat surface 26b of the exposure lens 26 is deformed along the curved surface 23a of the mold 23, so that the flat surface 26b becomes the same curved surface as the mold 23. Not only the surface 26b in contact with the mold 23 is deformed, but the upper surface 26a is also deformed in the same manner to become the same curved surface as the curved surface 23a (see FIG. 12B).

That is, the bottom surface 26b of the exposure lens 26 has a curved surface (female curved surface) opposite to the curved surface 23a, and the upper surface 26a has the same curved surface (male curved surface) as the curved surface 23a. Therefore, the upper surface 26a is used as the aspherical surface of the exposure lens 26.

Therefore, the bottom surface 26b, which is not used as an aspherical surface, must be ground to be a flat surface. Therefore, a mold 40 formed into a curved surface of a female mold for the mold 23 is prepared (see FIG. 12C), and this mold 40 is used as a lens fixing means at the time of polishing processing.

When the upper surface 26a of the exposure lens 26 is pressed against the surface of the lens fixing means 40, the two are brought into close contact with each other without any gap, so that a special adhesive is applied between them to fix the exposure lens 26 to the lens. It can be completely fixed to the means 40.

FIG. 13 is a plan view of a conventional polishing apparatus 50, and FIG. 14 is a partial sectional view thereof. The polishing device 50 has a polishing table 52. The polishing surface 52a is formed with fine grid-like grooves 56. A plurality of polishing surfaces 52a,
In this example, three exposure lenses 26 are rotatably mounted at equal intervals. The detailed structure for rotatably mounting is omitted.

The polishing table 52 is rotated at a predetermined speed while a predetermined amount of the polishing agent 55 is dropped from the nozzle 54. Since the exposure lens 26 is rotatably held on the polishing table 52 while holding the mounting position, when the polishing table 52 rotates, the exposure lens 26 also rotates at a slower speed than the rotation speed. The bottom surface 26b of the exposure lens 26 can be polished into a flat surface by friction based on the speed difference.

FIG. 14 is a block diagram of the essential parts of the polishing apparatus 50. The first holding ring 60 for fixing the exposure lens 26 and the lens fixing means 40 with the exposure lens 26 on the lower surface is a lens. It is attached to the outer peripheral surface of the fixing means 40. Further, a disc-shaped first weight 62 is placed on the upper surface of the lens fixing means 40, and the second holding ring 6 is further provided on the outer periphery of the first holding ring 60 including the first weight 62.
6 is attached.

A resin such as vinyl chloride is used for the first holding ring 60, and a metal material such as aluminum is used for the second holding ring 66.

Since the exposure lens 26 has a considerable weight and is hard, the exposure lens 26 has a certain force (50 to 60 kg).
The bottom surface 26b cannot be polished unless it is polished in the state of being applied. Therefore, as shown in FIG. 14, only the first weight 62 is not sufficient, and therefore the pressurizing means 68 is further provided on the upper surface thereof. An air pressure type cylinder using air pressure is used as the pressurizing means 68, and a predetermined pressurization is obtained by sending the compressed air pressure to the pressurizing means 68.

By the way, the first retaining ring 60 described above is used.
Is for fixing the fixing positions of the lens fixing means 40 and the exposure lens 26, and the second holding ring 6
6 is also for fixing the first weight 62 so as not to shift the positional relationship with the lens fixing means 40, so that the first weight 62 is not attached to each outer periphery very tightly.
Therefore, during polishing, they drop by their own weight and come into contact with the polishing surface 52a of the polishing table 52.

That is, as shown in FIG. 15, the polishing process is carried out with the end faces of the retaining rings 60, 66 in contact with the polishing surface 52a. As a result, the exposure lens 2
At the same time that the bottom surface 26b of 6 is polished, the holding ring 6
The end faces of 0 and 66 are also polished. Retaining ring 60,
The powder (dust) generated when 66 is polished is the bottom surface 26b.
If it gets in, the adverse effects such as the polished surface of the bottom surface 26b becoming rough will occur.

The used polishing agent 55 is reused by collecting and separating. When the holding rings 60 and 66 are also polished at the same time, the collected polishing agent contains other lens powders. In addition, since vinyl chloride powder and metal powder are mixed in, it is difficult to separate and recycle.

When the exposure lens 26 is polished, the bottom surface 26b cannot be accurately flattened unless a uniform pressure is applied to the entire surface of the lens. To do so,
4, the axis 26c of the exposure lens 26 and the first
The shaft center of the weight 62 and the shaft center 68a of the pressurizing means 68 must be aligned with each other, but the adjustment for the centering is troublesome.

In addition to this, air pressure is used as the pressurizing means 68, but the pressure of the air pressure sent to the pressurizing means 68 is uneven and fluctuates within a range of about ± 0.05 MPa. Was confirmed. Therefore, in order to always realize a constant pressurization, this pressure check is always required, and there is a problem that the work such as checking the pressure meter during polishing becomes troublesome. The equipment is also large-scale.

Such a problem is not limited to the exposure lens, but is also an aspherical lens whose both surfaces are aspherical.
This is a common problem when polishing one surface to a flat surface. Therefore, the present invention solves such a conventional problem, and in particular, an aspherical lens that simplifies the structure of the lens attaching means by eliminating the need for a retaining ring and eliminates the troublesome adjustment such as centering. A polishing device is proposed.

[0029]

In order to solve the above-mentioned problems, a polishing apparatus for an aspherical lens according to a first aspect of the present invention provides a surface of an aspherical lens whose both surfaces are non-flat. A polishing device for an aspherical lens that polishes a flat surface, the polishing device comprising: a polishing table; a lens mounting means mounted on the polishing table; and a holder for rotatably holding the lens mounting means. And the lens attaching means includes a lens fixing means for fixing the aspherical lens, and a fixed disk having a storage recess corresponding to the diameter of the aspherical lens, and an inner surface of the fixed disk. With the polishing surface of the stored aspherical lens facing downward, the lens mounting means is mounted on the polishing table so that the lens mounting means is held on the holder side. While being, so as not to contact the lens mounting means in the polishing table surface, length of the lens mounting means is characterized in that it is selected.

In the present invention, the exposure lens, which is an aspherical lens, is fixed to the lens fixing means, and the lens fixing means is attached to the fixed disk having the storage recess. Then, the lens mounting means is placed on the polishing surface such that the exposure lens is on the lower surface. At this time, the lens mounting means is regulated by the holder. As a result, the lens mounting means is regulated by the holder in a rotatable state.

The size of the fixed disk or the lens fixing means housed inside is selected so that the end surface of the fixed disk faces the polishing surface with a small clearance when the lens mounting means is placed. It That is, it is selected so that the end face of the fixed disk does not come into contact with the polishing surface even when the bottom surface of the exposure lens is polished until it becomes a flat surface. Of course, when the storage recesses provided in the fixed disk extend over several stages, the relative length relationship is selected so as to maintain a small clearance even when the exposure lens having the largest diameter is stored. By mounting the exposure lens inside the fixed disk in this manner, the conventional retaining ring becomes unnecessary.

Consistency of the axes of the exposure lens and the lens fixing means is ensured. Further, when the lens fixing means is housed in the housing concave portion, the lens fixing means and the fixed disk are designed so that their axes coincide with each other. Therefore, only by housing the lens fixing means in the fixed disc, the three axes of the exposure lens, the lens fixing means and the fixed disc coincide with each other, so that the adjustment of the axis becomes unnecessary.

Since the mounting recess provided on the top surface of the fixed disk is bored around the axis of the fixed disk, it is only necessary to mount the weight in the mounting recess to fix the axis of the fixed disk and the shaft. Therefore, the entire surface of the exposure lens can be uniformly pressed.

Since a predetermined pressure (50 to 60 kg) can be obtained only by adjusting the number of weights to be used, the conventional air type pressure means becomes unnecessary. This can greatly simplify the equipment.

[0035]

BEST MODE FOR CARRYING OUT THE INVENTION Next, a case in which an embodiment of an aspherical lens polishing apparatus according to the present invention is applied to the above-described exposure lens polishing will be described in detail with reference to the drawings. FIG. 1 shows an embodiment of an exposure lens polishing apparatus 50 according to the present invention. The polishing device 50 has a polishing table 52 having a predetermined diameter as in the conventional case. The polishing surface 52
In a, a grid-shaped groove 56 is provided on the entire surface.

In this embodiment, the holders 70 (70A, 70B, 70C) are arranged at equal intervals so that the three exposure lenses 26 can be processed at the same time. The holder 70 has a substantially J-shaped bow-shaped support plate 71, and one end thereof is fixed to a support base 72 by a pair of screws 74.

The inner curved surface 71a of the support plate 71 has a curvature adapted to the maximum diameter of the exposure lens 26 to be polished, and no matter which diameter of the exposure lens 26 is used,
A pair of rollers 76 is rotatably supported by the support plate 71 at a predetermined distance on the inner curved surface 71a so as to come into contact with the peripheral surface of the fixed disk 80 for housing the exposure lens (FIG. 1).
And FIG. 2). As the roller 76, a rubber roller or the like can be used. The other holders 70B and 70C are also configured in the same manner, so the description thereof will be omitted.

A nozzle 54 is provided on the upper surface of the polishing table 52.
Are arranged so that a desired amount of the abrasive 55 is dropped by a predetermined amount. The dropping position is appropriately around the center of the fixed disk 80 placed on the polishing surface 52a. As a result, the abrasive 55 can be evenly spread right under the fixed disk 80.

FIG. 3 shows an embodiment of the lens mounting means 78. A storage recess 82 as shown is formed on the inner surface side of the fixed disk 80. In order to allow the storage recesses 82 to be used even when the lens diameters are different, in this example with different inner diameters, storage recesses 82a, 82b, 82c of three stages are used.
Are formed. The inner diameter of the storage recess 82 has a shape matching the outer shape of the exposure lens 26 to be stored.

The lens fixing means 40 is housed and fixed in the housing recess 82. As the lens fixing means 40, a metallic disk-shaped mold is used as in the conventional case, and the exposure lens 26 to be polished is fixed to one surface of the lens fixing means 40 using an adhesive or the like. Therefore, the exposure lens 26 is attached to the lens fixing means 4
By sticking to 0, both axes coincide.

Further, since the storage recess 82 is provided around the axis of the fixed disk 80, the lens fixing means 40 is simply stored in the storage recess 82, and the exposure lens 26,
This means that the lens fixing means 40 and the fixed disk 80 are attached with their respective axes aligned.

On the side of the top surface 80b of the fixed disk 80, there is formed a mounting recess 84 having a predetermined depth centered on its axis. Further, a storage recess 82 is provided in a part of the mounting recess 84, and in this example, the through hole 8 that has penetrated to the storage recess 82a.
0a is drilled. The lens fixing means 40 housed in the housing recess 82a corresponding to the through hole 80a is also provided with the engagement hole 40a with a predetermined depth. At the time of polishing, the engaging pin 86 is inserted from the through hole 80a to the engaging hole 40a. By inserting the engagement pin 86, the lens fixing means 40 housed in the housing recess 82 can be fixed to the housing recess 82 and thus the fixed disk 80.
Free rotation of the lens fixing means 40 is prevented during polishing.

Of course, when the exposure lens 26 itself is provided with an orientation flat 28 as shown in FIG. 9, the inner diameter of the accommodating recess 82 also has a recess shape corresponding to it, so that the engaging pin is intentionally operated. It does not need to be configured to attach 86. However, the engagement pin 86
If used, it can be held without play even during polishing.

The weight 90 is placed in the placing concave portion 84 provided in the fixed disk 80. The pressure applied to the exposure lens 26 is adjusted by the number of weights 90 to be placed. Usually 50-6
Pressurized to about 0 kg. In the case of FIG. 3, two weights 90
The case where a predetermined pressurization is obtained only by mounting is shown.

If the mounting recesses 84 are provided and the weights 90 are mounted on the mounting recesses 84 as described above, the positioning of the weights 90 with respect to the fixed disk 80 becomes unnecessary, and the number of the weights 90 is simply increased or decreased. Since the pressure applied to the exposure lens 26 can be adjusted, there is no need to use the conventional pressure means using air pressure. When the pressurizing means is used, large-scale peripheral devices such as a compressor for pressurization, a hose, a pressure gauge for pressurization check, and a power source for the compressor are required. Furthermore, the polishing table 5
A mechanism must be added to prevent the three hoses from getting entangled even when the two hoses are rotated.

In the present invention, since the pressure adjustment is completed simply by adjusting the number of the weights 90, the construction of the polishing apparatus 50 has a feature that it can be remarkably simplified as compared with the prior art. Along with that, a significant cost reduction can be achieved.

The exposure lens to be polished is an aspherical lens as described above. The aspherical lenses shown in FIG. 1 and subsequent figures are for the purpose of explanation only, and the aspherical surfaces are different from the actual ones.

When the bottom surface 26b of the exposure lens 20 is polished, the exposure lens 26 is fixed to the lens fixing means 40, which is a mold, as shown in FIG. With the attached state, the engaging pin 86 is inserted from the top surface 80b side to fix the attachment position of the lens fixing means 40.

In this state, the lens mounting means 78
Is placed on the polishing surface 52a. According to the present invention, when the lens mounting means is mounted, the fixed disk 80 and the lens fixing means 40 housed therein are arranged such that the end surface of the fixed disk 80 faces the polishing surface 52a with a small clearance w. The thickness (length) is selected. That is, the exposure lens 2
The end surface of the fixed disk 80 is selected so as not to come into contact with the polishing surface 52a even when the bottom surface 26b of 6 is polished to be a flat surface.

Of course, when the storage recess 82 provided in the fixed disk 80 extends over several stages, the relative thickness relationship is selected so as to maintain a small gap w even when the exposure lens having the largest diameter is stored. To be done. In this way the fixed disk 8
If the exposure lens 26 is attached to the inside of 0, neither of the conventional holding rings 60 and 66 becomes necessary, and there is no influence of the ground powder.

When the lens attaching means 78 is placed on the polishing surface 52a, a part of the peripheral surface of the fixed disk 80 is placed so as to be in rolling contact with the roller 76 of the holder 70A as shown in FIG. Similarly, the lens mounting means 78 is mounted so as to be in rolling contact with the other holders 70B and 70C. After that, several weights 90 are mounted in the mounting recess 84.

After mounting the respective lens mounting means 78 in the state of FIG. 1, the polishing table 52 is rotated at a predetermined speed, for example, in the counterclockwise direction with the weight 90 placed. At the same time, the abrasive 55 is supplied from the nozzle 54. When the polishing table 52 rotates, the lens mounting means 78 also starts rolling in the same direction at a slower speed than the polishing table 52 while being in contact with the roller 76. The polishing agent 55 is supplied to the polishing surface 52a, and the lens mounting means 78 receives friction through the polishing agent 55, whereby the bottom surface 26b side of the exposure lens 26 is polished and the bottom surface 26b.
Can be flattened.

In the above-described embodiment, the polishing apparatus 50 according to the present invention is applied to the polishing processing of the aspherical lens used as the exposure lens, but one surface of the other aspherical lens used is also polished. The present invention can also be applied to cases.

[0054]

As described above, according to the present invention, an aspherical lens to be polished is housed inside the lens mounting means, and a space is provided between the lens mounting means and the polishing surface. According to this, since the aspherical lens can be fixed to the lens attaching means without using the retaining ring for fixing the aspherical lens, such a retaining ring conventionally used can be omitted, and the structure Can be simplified, and the cost of the polishing apparatus can be reduced accordingly.

Further, since the polishing surface and the lens mounting means do not come into contact with each other during the polishing process, the end surface of the lens mounting means is not rubbed by the polishing surface and the powder thereof is not mixed in the polishing agent. As a result, the polishing surface of the aspherical lens becomes rough, and the work when sorting and recycling the polishing agent for reuse is simplified.

Further, by only housing the aspherical lens in the lens mounting means, the axes of the fixed disk, the lens fixing means and the aspherical lens can be made coincident with each other, so that the centering work can be almost completely eliminated. As a result, workability is improved, and there is a practical advantage that the polishing processing time can be significantly shortened. Further, since no conventional air-type pressurizing means is used, the structure of the device can be greatly simplified, and at the same time, the cost can be greatly reduced. Therefore, the present invention is extremely suitable when applied to a polishing apparatus for an aspherical lens such as an exposure lens used for making phosphors for various cathode ray tubes.

[Brief description of drawings]

FIG. 1 is a plan view showing an embodiment in which a polishing apparatus according to the present invention is applied to a polishing process for an exposure lens.

FIG. 2 is a side view thereof.

FIG. 3 is a cross-sectional view showing a relationship between a fixed disk, an exposure lens, and a polishing surface.

FIG. 4 is a cross-sectional view showing a relationship between a panel and a phosphor layer.

FIG. 5 is a conceptual diagram of an exposure processing apparatus.

FIG. 6 is an explanatory diagram of exposure processing (No. 1).

FIG. 7 is an explanatory diagram of exposure processing (No. 2).

FIG. 8 is a partial cross-sectional view of a conventional exposure lens device.

FIG. 9 is a plan view of an exposure lens used therein.

FIG. 10 is a side view thereof.

FIG. 11 is a plan view of the exposure lens device when the exposure lens is attached.

FIG. 12 is an explanatory diagram of a production process of an aspherical lens.

FIG. 13 is a plan view of a polishing apparatus.

FIG. 14 is a partial cross-sectional view of a polishing device.

FIG. 15 is a partially enlarged cross-sectional view thereof.

[Explanation of symbols]

10 ... CRT, 12 ... Panel, 14 ... Phosphor layer, 16 ... Aperture grille, 26 ... Exposure lens, 24 ... Light source, 20 ... Exposure device, 50
... Polishing device, 52 ... Polishing table, 52a ...
・ Grinding surface, 70 ... Holder, 76 ... Roller, 8
0 ... Fixed disk, 82 ... Storage recess, 40 ... Lens fixing means, 90 ... Weight

   ─────────────────────────────────────────────────── ─── Continued front page    (72) Inventor Tetsuro Shibasaki             6-735 Kita-Shinagawa, Shinagawa-ku, Tokyo Soni             -Inside the corporation (72) Inventor Motoharu Nakayama             6-735 Kita-Shinagawa, Shinagawa-ku, Tokyo Soni             -In EMCS Co., Ltd. F-term (reference) 3C049 AA07 AA11 AB01 AB04 CA01                 3C058 AA07 AB01 AB04 AB06 CA06                       CB03 CB04

Claims (5)

[Claims] 1. A polishing device for an aspherical lens, which polishes one surface of an aspherical lens whose both surfaces are non-flat surfaces into a flat surface, the polishing device comprising: a polishing table; and a polishing table mounted on the polishing table. The lens mounting means includes a mounted lens mounting means and a holder for rotatably holding the lens mounting means. The lens mounting means includes a lens fixing means for fixing the aspherical lens and a diameter of the aspherical lens. A fixed disk having a storage recess corresponding to the lens mounting means is held on the holder side with the polishing surface of the aspherical lens housed on the inner surface of the fixed disk facing downward. As described above, the lens mounting means is placed on the polishing table, and the lens mounting means is mounted so that the lens mounting means does not contact the polishing table surface. The polishing apparatus of the aspherical lens, wherein a stage of the thickness was selected. 2. The aspherical lens according to claim 1, wherein the thickness of the fixed disk and the thickness of the lens fixing means are selected so that the lens mounting means does not come into contact with the polishing table surface. Polishing equipment. 3. The lens fixing means is housed and fixed in a housing recess formed in the inner surface of the fixed disk, so that the axes of the fixed disk and the lens fixing means are aligned with each other. The polishing apparatus for an aspherical lens according to claim 1. 4. The polishing apparatus for an aspherical lens according to claim 1, wherein a weight for adjusting pressure during polishing is mounted on the upper surface of the fixed disk. 5. The aspherical lens according to claim 1, wherein the aspherical lens is an exposure lens used when a phosphor layer is formed into a predetermined pattern through a color selection mechanism. Polishing equipment.