Optical components

Abstract

To properly execute inspection and assembly to a product.SOLUTION: An optical member 10 comprises: a first optical surface 12 and a second optical surface 14 which oppose each other along an optical axis direction and at least one of which is in the curved shape; and a planar cut surface 24 which is formed in an outer periphery 20 when viewed from the optical axis direction. When the shortest distance from a first connection part 24A being a connection part of the first optical surface 12 and the cut surface 24 to an optical axis AX is a distance AO, the shortest distance from a second connection part 24B being a connection part of the second optical surface 14 and the cut surface 24 to the optical axis AX is a distance BO, and a flatness of the cut surface 24 is a flatness F, a relation of a formula (1) is satisfied.SELECTED DRAWING: Figure 1

Description

Technical Field

[0001] The present invention relates to an optical member.

Background Art

[0002] For optical members such as lenses for cameras, a part of the outer periphery may be cut for miniaturization. For example, Patent Document 1 describes a lens having a non-arc portion (cut surface), which is a cut surface, on the outer periphery. Such a lens with a part of the outer periphery cut may be inspected and assembled into a product based on the cut surface.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] However, when inspecting or assembling a product based on the cut surface, the reference position may vary, and there is a risk that the inspection and assembly into the product cannot be properly carried out.

[0005] The present invention has been made in view of the above problems, and an object thereof is to provide an optical member capable of properly performing inspection and assembly into a product.

Means for Solving the Problems

[0006] To solve the above-mentioned problems and achieve the objective, the optical member according to this disclosure has a first optical surface and a second optical surface that face each other along the optical axis and at least one of which is curved, and a planar cut surface formed on the outer circumference when viewed from the optical axis, and when the shortest distance from the first connection part, which is the connection part between the first optical surface and the cut surface, to the optical axis is denoted as distance AO, the shortest distance from the second connection part, which is the connection part between the second optical surface and the cut surface, to the optical axis is denoted as distance BO, and the flatness of the cut surface is denoted as flatness F, the relationship of the following equation (1) is satisfied. BO≧AO+F ···(1) [Effects of the Invention]

[0007] According to the present invention, inspection and assembly into products can be carried out appropriately. [Brief explanation of the drawing]

[0008] [Figure 1] Figure 1 is a schematic diagram of the optical component according to this embodiment. [Figure 2] Figure 2 is a schematic diagram of the optical component according to this embodiment. [Figure 3] Figure 3 is a schematic diagram of an optical component according to another example of this embodiment. [Figure 4] Figure 4 is a schematic diagram illustrating the evaluation method in the embodiment. [Figure 5] Figure 5 is a graph showing the evaluation results for each example. [Modes for carrying out the invention]

[0009] Preferred embodiments of the present invention will be described in detail below with reference to the attached drawings. Note that the present invention is not limited to these embodiments, and if there are multiple embodiments, they may be constructed by combining these embodiments. Numerical values ​​are rounded to the nearest whole number.

[0010] (Optical components) Figures 1 and 2 are schematic diagrams of the optical element according to this embodiment. The optical element 10 according to this embodiment is an optical element having an optical function, and in this embodiment it is a lens. The optical element 10 is mounted on an imaging device that captures images, but its use is arbitrary and is not limited to use in an imaging device.

[0011] As shown in Figure 1, the optical member 10 has a first optical surface 12 and a second optical surface 14. If we define direction Z as the direction along the optical axis AX (central axis of the optical element) of the optical member 10, then the first optical surface 12 and the second optical surface 14 can be said to be surfaces of the optical member 10 formed opposite each other in direction Z (optical axis direction). Light incident on the optical member 10 from one of the first optical surface 12 and the second optical surface 14 is transmitted inside the optical member 10 and exits from the other of the first optical surface 12 and the second optical surface 14. Hereafter, one direction perpendicular to direction Z will be defined as direction X, and the direction perpendicular to both direction Z and direction X will be defined as direction Y.

[0012] As shown in Figure 1, in this embodiment, the first optical surface 12 is curved and the second optical surface 14 is planar. However, it is not limited to this; for example, both the first optical surface 12 and the second optical surface 14 may be curved, or the first optical surface 12 may be planar and the second optical surface 14 may be curved. In other words, the optical member 10 can be said to have at least one of the first optical surface 12 and the second optical surface 14 being curved. In the example of Figure 1, the first optical surface 12 is convex and spherical. However, it is not limited to this; the first optical surface 12 may be concave or aspherical. In other words, the optical member 10 may be a spherical lens or an aspherical lens. Similarly, when the second optical surface 14 is curved, it may be either convex or concave, or spherical or aspherical.

[0013] The light transmitted through the optical element 10 may be visible light or infrared light. For example, when the optical element 10 is used for visible light applications, it is preferable that the average transmittance of light with wavelengths of 400 nm to 800 nm is 80% or more, more preferably 85% or more, and even more preferably 90% or more. Also, when the optical element 10 is used for infrared light applications, it is preferable that the average transmittance of light with wavelengths of 0.8 μm to 1.2 μm is 80% or more, more preferably 85% or more, and even more preferably 90% or more. When the transmittance is within this range, the optical element can function appropriately. The transmittance can be measured, for example, by measuring the spectral transmittance curve using a UV-Vis spectrophotometer (Hitachi High-Technologies Corporation (U-4150 model)). Note that the transmittance referred to here may refer to the internal transmittance. Furthermore, the average transmittance is the average value of the transmittance for light of each wavelength within that wavelength band (in this case, 400 nm to 800 nm or 0.8 μm to 1.2 μm). In addition, the transmittance referred to here is the transmittance when light is incident from one of the first optical surface 12 and the second optical surface 14 and exits from the other of the first optical surface 12 and the second optical surface 14.

[0014] The thickness D of the optical element 10 is preferably 0.10 mm or more and 10 mm or less, more preferably 0.15 mm or more and 6 mm or less, and even more preferably 0.20 mm or more and 3 mm or less. Here, thickness D is the thickness of the optical element 10 at a position on the optical axis AX. In other words, thickness D can be said to be the length along the Z direction from the first optical surface 12 to the second optical surface 14 of the optical element 10 at a position on the optical axis AX. By keeping thickness D within this range, the size of the optical element 10 can be reduced while maintaining its optical properties.

[0015] Furthermore, the optical component 10 is preferably made of glass. Examples of glass for the optical component 10 include soda-lime glass such as blue plate, low-alkali borosilicate glass, borosilicate crown glass, crown glass, borosilicate glass, alkali-free glass, optical glass (e.g., barium glass, phosphate silicate glass, fluoride glass, lanthanum glass, flint glass, etc.), aluminosilicate chemically strengthened glass, quartz glass (glass made of SiO2), sapphire glass (glass made of Al2O3), calcium fluoride glass (glass made of CaF2), and other transparent glass substrates. The optical component 10 being made of glass allows for appropriate maintenance of optical properties. However, the material of the optical component 10 may be arbitrary, and for example, it may be made of resin.

[0016] (Cut surface) As shown in Figure 2, a cut surface 24 is formed on the outer circumference 20, which is the radially outer portion of the optical element 10. Here, "radial direction" refers to the radial direction when the optical axis AX is the center. If the portion of the outer circumference 20 other than the cut surface 24 is called the outer circumference 22, the outer circumference 22 is curved, and the cut surface 24 is planar. The flatness F of the cut surface 24 is preferably 0.1 μm or more and 15 μm or less, more preferably 0.3 μm or more and 10 μm or less, and even more preferably 0.5 μm or more and 5 μm or less. When the flatness F is within this range, the cut surface 24 is sufficiently planar, and inspection and assembly into products can be carried out appropriately. When the flatness F is within the above range, excessive quality is avoided and production can be carried out efficiently. In addition, in this embodiment, the PV (Peak to Valley) value based on the least-squares plane of the cut surface 24 may be defined as the flatness F. More specifically, among the entire area of the cut surface 24, the distance in the direction orthogonal to the least-squares plane of the cut surface 24 between the most protruding point and the most recessed point in the direction orthogonal to the least-squares plane of the cut surface 24 with respect to the least-squares plane of the cut surface 24 may be defined as the flatness F. The least-squares plane of the cut surface 24 is a plane obtained by plotting the entire area on the cut surface 24 and approximating each point (each coordinate) on the plotted cut surface 24 by the least-squares method. The flatness F can be measured using NewView manufactured by Zygo (Model No.: NV6200 MICROSCOPE Program: MetroPro Version 8.1.5). The measurement conditions are as follows. [Measurement Controls] Min Mod(%): 2 Min Area Size: 7 Acquisition Mode: Scan Subtract sys Err: off (Phase Controls) AGC: On Phase Res: High Connection Order: Location Discon Action: Filter (Update zoom) Remove Fringes: On Number of Average: 0 FDA Noise Threshold: 10 (Scan Controls) Scan Length: When the PV value is less than 150 μm, Extended is not used and it is set to the minimum value that can measure the entire measurement surface. When the PV value is 150 μm or more, Extended is used and it is set to 1.5 times or less of the PV value. FDA Res: High (If using Extended Scan Length, set to Low.) [Surface Map Controls] Reference: Plane phere Radius: 0nm Trim: 0 Data Fill: Off Filter: off Remove Spikes: On Spike Height (xRMS): 1

[0017] Furthermore, the outer periphery 22 and the cut surface 24 are discontinuous, and the connecting portion 26, which is the connection (boundary) between the outer periphery 22 and the cut surface 24, is angular (edge-shaped). In other words, when the optical member 10 is viewed from the Z direction, the line along the cut surface 24 and the line along the outer periphery 22 are discontinuous, and the portion of the connecting portion 26, which is the boundary between the line along the cut surface 24 and the line along the outer periphery 22, can be said to be a point of discontinuity (corner). It should be noted that the angular shape of the connecting portion 26 is not strictly limited to being an edge, but may also include shapes with chamfers or rounded edges.

[0018] In this embodiment, when viewed from the Z direction, the optical member 10 has a shape in which the portion of a circle with the cut surface 24 is missing, with the circular portion of the outer edge being the outer circumference 22 and the missing portion of the outer edge being the cut surface 24. However, the optical member 10 is not limited to a shape in which the portion of a circle with the cut surface 24 is missing, but may also have a shape in which, for example, the portion of an ellipse with the cut surface 24 is missing. In this case, the elliptical portion becomes the outer circumference 22. The optical member 10 is cut in such a way that a portion overlapping with the optical axis AX remains when viewed from the Z direction.

[0019] The cut surface 24 is connected to the first optical surface 12 and the second optical surface 14. The cut surface 24 is discontinuous with the first optical surface 12, and the first connection portion 24A, which is the connection portion (boundary portion) between the cut surface 24 and the first optical surface 12, is angular (edge-shaped). The first connection portion 24A can be said to be the boundary line (ridge) between the cut surface 24 and the first optical surface 12, and extends in a direction perpendicular to direction Z (direction Y in the example of Figure 1). In other words, when the optical member 10 is viewed from a direction perpendicular to direction Z (direction Y in the example of Figure 1), the line along the first optical surface 12 and the line along the cut surface 24 are discontinuous, and the portion of the first connection portion 24A, which is the boundary between the line along the first optical surface 12 and the line along the cut surface 24, can be said to be a point of discontinuity (corner). Furthermore, the term "angular" for the first connecting portion 24A is not strictly limited to being an edge shape, but may also include shapes with chamfers or rounded edges.

[0020] The cut surface 24 is discontinuous with the second optical surface 14, and the second connecting portion 24B, which is the connection portion (boundary portion) between the cut surface 24 and the second optical surface 14, is angular (edge-shaped). The second connecting portion 24B can be said to be the boundary line (ridge) between the cut surface 24 and the second optical surface 14, and extends in a direction perpendicular to direction Z (direction Y in the example of Figure 1). In other words, when the optical member 10 is viewed from a direction perpendicular to direction Z (direction Y in the example of Figure 1), the line along the second optical surface 14 and the line along the cut surface 24 are discontinuous, and the portion of the second connecting portion 24B, which is the boundary between the line along the second optical surface 14 and the line along the cut surface 24, can be said to be a point of discontinuity (corner). Note that the second connecting portion 24B being angular is not strictly limited to being edge-shaped, but may also include shapes with chamfers or rounded edges.

[0021] Here, if the shortest distance from the optical axis AX to the first connection part 24A is denoted as distance AO, and the shortest distance from the optical axis AX to the second connection part 24B is denoted as distance BO, the cut surface 24 is formed to satisfy the following equation (1).

[0022] BO≧AO+F ···(1)

[0023] In other words, the distance BO from the optical axis AX to the second connection portion 24B is longer than the distance AO from the optical axis AX to the first connection portion 24A. In other words, the second connection portion 24B protrudes radially outward (away from the optical axis AX in direction X in the example of Figure 1) than the first connection portion 24A. Furthermore, since the distance BO is greater than or equal to the sum of the distance AO and the flatness F, the second connection portion 24B protrudes the most radially outward on the cut surface 24. Because the distance BO is longer than the distance AO, it is possible to reliably set the second connection portion 24B as the reference position on the cut surface 24 when inspecting and assembling the optical component 10, and the inspection and assembly of the optical component 10 can be performed appropriately.

[0024] In this embodiment, distance AO may be the shortest distance between the optical axis AX and the least-squares line of the first connection part 24A. The least-squares line of the first connection part 24A is a line obtained by plotting points (each coordinate) on the first connection part 24A along its extension direction (here, direction Y) and approximating each point on the first connection part 24A using the least-squares method. Similarly, distance BO may be the shortest distance between the optical axis AX and the least-squares line of the second connection part 24B. The least-squares line of the second connection part 24B is a line obtained by plotting points on the second connection part 24B along its extension direction (here, direction Y) and approximating each point on the second connection part 24B using the least-squares method. Distances AO and BO can be measured using an image dimension measuring instrument IM manufactured by Keyence.

[0025] Furthermore, if the shortest distance from the optical axis AX to the outer periphery 22 is denoted as distance r, it is preferable that the cut surface 24 be formed to satisfy the following equation (2). Note that if the optical member 10 has a shape in which a part of a circle is cut when viewed from the Z direction, distance r corresponds to the radius of the circular portion of the optical member 10 when viewed from the Z direction.

[0026] BO ≤ F + r ... (2)

[0027] In other words, the cut surface 24 is located radially inward from the outer circumference 22.

[0028] Furthermore, it is preferable that the cut surface 24 be formed to satisfy the following equation (3).

[0029] BO <AO+F+0.05·r ···(3)

[0030] In other words, it is preferable that distance BO is shorter than the sum of distance AO, flatness F, and 5% of distance r. It is more preferable that distance BO is shorter than the sum of distance AO, flatness F, and 3% of distance r, and even more preferable that it is shorter than the sum of distance AO, flatness F, and 1% of distance r. As the difference between distance BO and distance AO increases, the overall size of the optical element 10 relative to its effective area increases, but by setting distance BO within this range, it is possible to maintain the effective area of ​​the optical element 10 while suppressing an increase in the overall size of the optical element 10.

[0031] Furthermore, it is preferable that the cut surface 24 is formed to satisfy the following equation (4).

[0032] 0.44·r <AO<0.71·r ···(4)

[0033] By keeping the distance AO within the range shown in equation (4), the effective area of ​​the optical element 10 can be appropriately maintained. In particular, even when a sensor (such as an image sensor) is placed on the extension of the optical axis AX of the optical element 10, it is possible to accommodate various aspect ratios of images captured by the sensor.

[0034] Furthermore, the cut surface 24 is inclined with respect to direction Z such that it widens radially outward (away from the optical axis AX in direction X in the example of Figure 1) as it moves from the first connection portion 24A toward the second connection portion 24B in direction Z. The angle between the cut surface 24 and the optical axis AX when the optical member 10 is viewed from a direction perpendicular to direction Z and along the cut surface 24 (direction Y in the example of Figure 1) is denoted as angle θ. In this case, angle θ is preferably 1° or less, and more preferably 0.5° or less. By having angle θ within this range, chipping due to the edge of the second connection portion 24B becoming too sharp can be appropriately suppressed. In particular, for example, when the optical member 10 is housed (fixed) in a case with a draft angle on its inner surface, a small angle θ suppresses the possibility of the second connection portion 24B touching the inner surface of the case, thereby appropriately suppressing chipping. Also, by having angle θ within this range, misalignment when the optical member 10 is incorporated into a product can be suitably suppressed. However, the angle θ is not limited to the above range and may be arbitrary.

[0035] Furthermore, the arithmetic mean roughness Ra of the cut surface 24 of the optical component 10 is preferably 0.01 μm or more and 2.00 μm or less, more preferably 0.02 μm or more and 1.00 μm or less, and even more preferably 0.03 μm or more and 0.50 μm or less, as specified in JIS B 0601:2001. When the arithmetic mean roughness Ra of the cut surface 24 is within this range, for example, diffuse reflection of light inside and outside the optical component 10 is suppressed, and the optical properties of the optical component 10 can be appropriately maintained. In addition, it becomes easier to apply light-shielding processing such as black coating to the cut surface 24.

[0036] In this embodiment, the outer peripheral portion 22 is also discontinuous with respect to the first optical surface 12 and the second optical surface 14. That is, the first optical surface 12, which is a convex curved surface, and the second optical surface 14, which is planar, are connected via the curved outer peripheral portion 22. However, it is not limited to this, and the outer peripheral portion 22 may be continuous with at least one of the first optical surface 12 and the second optical surface 14. That is, for example, the convex first optical surface 12 may be formed extending to the outer peripheral portion 20, and the first optical surface 12 and the second optical surface 14 may be directly connected at the outer peripheral portion 20. In this case, the outer peripheral portion of the first optical surface 12 can be said to constitute the outer peripheral portion 22, and the outer peripheral portion 22 can be said to be continuous with the first optical surface 12.

[0037] (Other examples of optical components) Figure 3 is a schematic diagram of an optical member according to another example of this embodiment. In the examples of Figures 1 and 2, the optical member 10 has two opposing cut surfaces 24, but the number of cut surfaces 24 is not limited to two and can be arbitrary. For example, as shown in Figure 3, there may be only one cut surface 24, or there may be three or more cut surfaces 24. Also, in the examples of Figures 1 and 2, the two cut surfaces 24 are formed at positions opposite each other across the optical axis AX when viewed from the Z direction, that is, offset by 180 degrees in the circumferential direction, but the positions in which they are formed are not limited to this. Multiple cut surfaces 24 may be formed offset by any angle in the circumferential direction.

[0038] (Manufacturing method) The optical component 10 described above may be manufactured by any method. For example, if the optical component 10 is made of glass, the optical component 10 with a cut surface 24 may be manufactured by removing a part of the outer circumference of a circularly shaped glass optical component using a tool (such as a die cutter, slicer, or core remover).

[0039] (effect) As described above, the optical member 10 according to this embodiment has a first optical surface 12 and a second optical surface 14 facing each other along the optical axis direction (direction Z), at least one of which is curved, and a planar cut surface 24 formed on the outer circumference 20 when viewed from the optical axis direction. When the shortest distance from the first connection part 24A, which is the connection part between the first optical surface 12 and the cut surface 24, to the optical axis AX is denoted as distance AO, the shortest distance from the second connection part 24B, which is the connection part between the second optical surface 14 and the cut surface 24, to the optical axis AX is denoted as distance BO, and the flatness of the cut surface 24 is denoted as flatness F, the optical member 10 satisfies the relationship of equation (1) described above.

[0040] In this case, optical components with a portion of their outer circumference cut off may be inspected and assembled into products using the cut surface as a reference. However, when inspecting or assembling products using the cut surface as a reference, the reference position may vary, potentially preventing proper inspection and assembly. For example, if the shape of the cut surface varies or the cross-section is distorted, the reference position on the cut surface cannot be uniquely determined. In contrast, the optical member 10 according to this embodiment is shaped such that the distance BO is greater than or equal to the sum of the distance AO and the flatness F. Therefore, the most protruding part of the entire cut surface 24 becomes the second connection part 24B. For example, by using the second connection part 24B as the abutment position during inspection and assembly, the second connection part 24B can be reliably designated as the reference position. Consequently, variations in the reference position are suppressed, enabling proper inspection and product assembly.

[0041] Furthermore, if the shortest distance from the outer circumference 20 other than the cut surface 24 (outer circumference 22) to the optical axis AX is taken as distance r, it is preferable that the optical member 10 satisfies the relationship of equation (2) described above. In this embodiment, the optical member 10 has a shape in which the cut surface 24 is reliably formed because the distance BO is less than or equal to the sum of the flatness F and the distance r, and the size can be reduced by forming the cut surface 24.

[0042] It is preferable that the optical element 10 satisfies the relationship shown in equation (3) above. By keeping the upper limit of BO within the range shown in equation (3), it is possible to maintain the effective area of ​​the optical element 10 while suppressing an increase in the overall size of the optical element 10.

[0043] The cut surface 24 is inclined to widen radially outward as it moves from the first connection portion 24A side toward the second connection portion 24B side in the optical axis direction. In this embodiment, the optical member 10 has a shape in which the cut surface 24 widens toward the second connection portion 24B side, making it possible to properly perform inspection and product assembly with the second connection portion 24B as the reference position.

[0044] Preferably, the inclination angle (angle θ) of the cut surface 24 with respect to the optical axis AX, when viewed from a direction perpendicular to the optical axis AX (direction Y in the example of Figure 1), is 1° or less. By keeping the angle θ within this range, chipping caused by the edge of the second connection portion 24B becoming too sharp can be appropriately suppressed.

[0045] The optical component 10 is preferably made of glass. Being made of glass allows it to exhibit appropriate optical properties.

[0046] (Examples) Next, we will describe the examples. Figure 4 is a schematic diagram illustrating the evaluation method in the examples.

[0047] (Example 1) In Example 1, multiple optical members 10 were manufactured, each having a cut surface 24 that satisfies equation (1) and a second optical surface 14 that is planar. That is, in the optical members of Example 1, the distance BO is greater than or equal to the sum of the distance AO and the flatness F (BO-AO-F≧0). The distance BO, the distance AO, and the flatness F were measured using the method described in this embodiment. Then, as shown in Figure 4, the optical member 10 was positioned on a horizontal plane S such that the second optical surface 14 was facing the plane S, and the cut surface 24 of the optical member 10 was brought into contact with a member A having a vertically extending surface AS. In this state, the shortest distance CO from the optical axis AX to the plane S was measured. Distance CO corresponds to the distance from the most protruding point on the cut surface 24 (the point in contact with surface AS) to the optical axis AX. Distance CO was measured in the same way as distance BO. Distance CO was measured for each optical member 10 in Example 1 in the same way.

[0048] (Example 2) In Example 2, multiple optical members 10 were manufactured that had a cut surface that did not satisfy equation (1) and whose second optical surface 14 was planar. That is, in the optical members of Example 2, the distance BO is less than the sum of the distance AO and the flatness F (BO-AO-F<0). The distance BO, the distance AO, and the flatness F were measured using the method described in this embodiment. Then, the distance CO was measured for each optical element 10 in Example 2 using the same method as in Example 1.

[0049] (Evaluation results) Figure 5 is a graph showing the evaluation results for each example. The horizontal axis of Figure 5 is the value obtained by subtracting the sum of the distance AO and the flatness F from the distance BO (BO-AO-F), and the vertical axis is the value obtained by subtracting the distance BO from the distance CO (CO-BO). As shown in Figure 5, each optical component in Example 1, which is an embodiment, has a small variation in (CO-BO) and is close to 0. That is, in Example 1, the second connection part 24B can be used as the reference position to abut against the surface AS, and it can be seen that the deviation and variation of the reference position can be suppressed. On the other hand, each optical component in Example 2, which is a comparative example, has a large variation in (CO-BO), and it can be seen that the deviation and variation of the reference position cannot be suppressed.

[0050] Although embodiments of the present invention have been described above, the embodiments are not limited to those described herein. Furthermore, the aforementioned components include those that can be easily conceived by those skilled in the art, those that are substantially the same, and those that fall within the so-called equivalent range. Moreover, the aforementioned components can be combined as appropriate. Furthermore, various omissions, substitutions, or modifications of the components can be made without departing from the spirit of the embodiments described above. [Explanation of symbols]

[0051] 10 Optical components 12 1st optical surface 14 Second optical surface 20 Outer circumference 22 Outer periphery 24 cut surfaces 24A First connection section 24B Second connection section AO, BO, r distance AX optical axis F Flatness

Claims

1. A first optical surface which is curved and faces the optical axis, and a second optical surface which is planar, A planar cut surface and a curved outer portion are formed on the outer circumference when viewed from the optical axis direction. It has, When the shortest distance from the first connection point, which is the connection point between the first optical surface and the cut surface, to the optical axis is denoted as distance AO, the shortest distance from the second connection point, which is the connection point between the second optical surface and the cut surface, to the optical axis is denoted as distance BO, and the flatness of the cut surface is denoted as flatness F, then the following relationship (1) is satisfied, The outer periphery extends along the optical axis, The cut surface is inclined to widen radially outward as it moves from the first connection point side toward the second connection point side in the optical axis direction. Optical components. BO≧AO+F...(1)

2. The optical member according to claim 1, wherein the shortest distance from the portion of the outer circumference other than the cut surface to the optical axis is denoted as distance r, and the relationship of the following equation (2) is satisfied. BO≦F+r...(2)

3. The optical member according to claim 2, satisfying the following relationship (3). BO<AO+F+0.05・r...(3)

4. The optical member according to claim 1, wherein the inclination angle of the cut surface with respect to the optical axis, when viewed from a direction perpendicular to the optical axis, is 1° or less.

5. An optical component made of glass, according to any one of claims 1 to 4.

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