JPH10221602A5 - - Google Patents
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- JPH10221602A5 JPH10221602A5 JP1997025135A JP2513597A JPH10221602A5 JP H10221602 A5 JPH10221602 A5 JP H10221602A5 JP 1997025135 A JP1997025135 A JP 1997025135A JP 2513597 A JP2513597 A JP 2513597A JP H10221602 A5 JPH10221602 A5 JP H10221602A5
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前記光学系は少なくとも２回の内部反射を行うように、前記３つの面の中の少なくとも２つの面を反射作用を有する面で形成すると共に、前記の２つの反射作用を有する面によって反射された光線を前記光学系内部で折り返すような位置に前記の２つの反射作用を有する面を配置し、
前記反射作用を有する２つの面のうち、１つの面の形状は面内及び面外共に回転対称軸を有さない回転非対称面にて形成され、他の１つの面の少なくとも有効面（面の全領域中で光束が透過及び／又は反射をする領域）の形状が有効面内に回転対称軸を有する回転対称非球面にて構成され、
前記対称非球面が、前記光学系を通過する光束を入射若しくは射出させる透過作用と前記光学系内部で前記光束を折り曲げる反射作用とを併せ持つ第１面として形成され、
前記回転非対称面が前記第１面と対向配置された第２面として形成され、さらに、
前記光学系を通過する光束を射出若しくは入射させる透過作用を有する第３面が、前記第１面と前記第２面との対向方向に対して略垂直方向の位置に配置され、かつ、前記第１面が前記第２面の方向に凸面を向けた形状に構成され、
以下の条件を満足することを特徴とする偏心プリズム光学系。
５°＜α＜３０° ・・・（０−１）
ただし、αは、前記第１面の回転対称非球面の回転中心軸が、前記光学系の瞳の中心を通り像面中心に到達する軸上主光線が瞳を射出して前記第１面に交差するまでの直線と交差する角度（面の傾き角度）である。In a decentered prism optical system having at least three surfaces disposed decentered from one another, and a transparent medium having a refractive index of 1.3 or more filled between the three surfaces,
At least two of the three surfaces are formed by surfaces having a reflective action so that the optical system performs at least two internal reflections, and the two reflective surfaces are arranged at positions so that the light beam reflected by the two reflective surfaces is folded back within the optical system;
one of the two surfaces having a reflecting action is formed as a rotationally asymmetric surface having no axis of rotational symmetry both in-plane and out-plane, and at least the effective surface (the area of the entire surface through which a light beam is transmitted and/or reflected) of the other surface is formed as a rotationally symmetric aspherical surface having an axis of rotational symmetry within the effective surface;
the symmetric aspherical surface is formed as a first surface having both a transmitting action for causing a light beam passing through the optical system to enter or exit and a reflecting action for bending the light beam within the optical system,
the rotationally asymmetric surface is formed as a second surface disposed opposite to the first surface, and
a third surface having a transmitting function for causing a light beam passing through the optical system to exit or enter is disposed at a position in a direction substantially perpendicular to a direction in which the first surface and the second surface oppose each other, and the first surface is configured to have a convex surface facing toward the second surface,
A decentered prism optical system characterized by satisfying the following conditions:
5°<α<30°...(0-1)
Here, α is the angle (inclination angle of the surface) at which the central axis of rotation of the rotationally symmetric aspherical surface of the first surface intersects with the straight line along which an axial chief ray that passes through the center of the pupil of the optical system and reaches the center of the image plane exits the pupil and intersects with the first surface.
前記光学系は少なくとも２回の内部反射を行うように、前記３つの面の中の少なくとも２つの面を反射作用を有する面で形成すると共に、前記の２つの反射作用を有する面によって反射された光線を前記光学系内部で折り返すような位置に前記の２つの反射作用を有する面を配置し、
前記反射作用を有する２つの面のうち、１つの面の形状は面内及び面外共に回転対称軸を有さない回転非対称面にて形成され、他の１つの面の少なくとも有効面（面の全領域中で光束が透過及び／又は反射をする領域）の形状が有効面内に回転対称軸を有する回転対称球面にて構成され、
前記対称球面が、前記光学系を通過する光束を入射若しくは射出させる透過作用と前記光学系内部で前記光束を折り曲げる反射作用とを併せ持つ第１面として形成され、
前記回転非対称面が前記第１面と対向配置された第２面として形成され、さらに、
前記光学系を通過する光束を射出若しくは入射させる透過作用を有する第３面が、前記第１面と前記第２面との対向方向に対して略垂直方向の位置に配置され、かつ、前記第１面が前記第２面の方向に凸面を向けた形状に構成され、
以下の条件を満足することを特徴とする偏心プリズム光学系。
５°＜α＜３０° ・・・（０−１）
ただし、αは、前記光学系の瞳の中心を通り像面中心に到達する軸上主光線が前記第１面により反射される点を通る前記対称球面の回転中心軸が、前記光学系の瞳の中心を通り像面中心に到達する軸上主光線が瞳を射出して前記第１面に交差するまでの直線と交差する角度（面の傾き角度）である。In a decentered prism optical system having at least three surfaces disposed decentered from one another, and a transparent medium having a refractive index of 1.3 or more filled between the three surfaces,
At least two of the three surfaces are formed by surfaces having a reflective action so that the optical system performs at least two internal reflections, and the two reflective surfaces are arranged at positions so that the light beam reflected by the two reflective surfaces is folded back within the optical system;
the shape of one of the two surfaces having a reflecting action is formed as a rotationally asymmetric surface that does not have an axis of rotational symmetry both in-plane and out-plane, and the shape of at least the effective surface (the area within the entire area of the surface through which a light beam is transmitted and/or reflected) of the other surface is formed as a rotationally symmetric spherical surface that has an axis of rotational symmetry within the effective surface;
the symmetrical spherical surface is formed as a first surface having both a transmitting action for causing a light beam passing through the optical system to enter or exit and a reflecting action for bending the light beam within the optical system,
the rotationally asymmetric surface is formed as a second surface disposed opposite to the first surface, and
a third surface having a transmitting function for causing a light beam passing through the optical system to exit or enter is disposed at a position in a direction substantially perpendicular to a direction in which the first surface and the second surface oppose each other, and the first surface is configured to have a convex surface facing toward the second surface,
A decentered prism optical system characterized by satisfying the following conditions:
5°<α<30°...(0-1)
Here, α is the angle (inclination angle of the surface) at which the rotation central axis of the symmetrical spherical surface, which passes through the point at which an axial chief ray that passes through the center of the pupil of the optical system and arrives at the center of the image surface is reflected by the first surface, intersects with the straight line along which the axial chief ray that passes through the center of the pupil of the optical system and arrives at the center of the image surface exits the pupil and intersects with the first surface.
前記第１面が有効面内にてその透過作用と反射作用とが少なくとも一部の領域で重なり合うように形成されていると共に、少なくとも前記第１面の有効面内の透過作用と反射作用との重なり合う領域での反射作用が全反射作用によるように構成されていることを特徴とする偏心プリズム光学系。3. The decentered prism optical system according to claim 1,
A decentered prism optical system characterized in that the first surface is formed so that its transmission and reflection functions overlap in at least a partial area within its effective surface, and the reflection function in at least the area within the effective surface of the first surface where the transmission and reflection functions overlap is a total reflection function.
前記第１面の回転対称面は、前記第２面の方向に凸面と向けた非球面又は球面にて形成されていることを特徴とする偏心プリズム光学系。3. The decentered prism optical system according to claim 1,
10. A decentered prism optical system, wherein the rotationally symmetric surface of the first surface is formed as an aspherical or spherical surface convex toward the second surface.
前記第２面がアナモルフィック面にて形成されていることを特徴とする偏心プリズム光学系。3. The decentered prism optical system according to claim 1,
A decentered prism optical system, wherein the second surface is formed as an anamorphic surface.
前記アナモルフィック面の有する２つの対称面のうち、少なくとも１つの対称面内に前記第１面の回転対称面の回転対称軸が位置するように、前記第１面と前記第２面とが配置されていることを特徴とする偏心プリズム光学系。6. The decentered prism optical system according to claim 5,
a first surface and a second surface arranged such that an axis of rotational symmetry of the rotationally symmetric surface of the first surface is located within at least one of two planes of symmetry of the anamorphic surface.
前記第２面が、対称面を１つのみ有する回転非対称面にて形成されていることを特徴とする偏心プリズム光学系。3. The decentered prism optical system according to claim 1,
A decentered prism optical system, wherein the second surface is formed by a rotationally asymmetric surface having only one plane of symmetry.
前記の対称面を１つのみ有する回転非対称面の対称面内に前記第１面の回転対称面の回転対称軸が位置するように、前記第１面と前記第２面とが配置されていることを特徴とする偏心プリズム光学系。8. The decentered prism optical system according to claim 7,
a rotationally asymmetric surface having only one plane of symmetry, the first surface and the second surface being arranged such that an axis of rotational symmetry of the rotationally symmetric surface of the first surface is located within the plane of symmetry of the rotationally asymmetric surface having only one plane of symmetry.
前記偏心プリズム光学系の瞳の中心を通り、像面中心に到達する軸上主光線が瞳を射出し前記第１面に交差するまでの直線によって定義される軸をＺ軸とし、このＺ軸と直交しかつ前記偏心プリズム光学系を構成する各面の偏心面内の軸をＹ軸と定義し、Ｚ軸と直交しかつＹ軸と直交する軸をＸ軸と定義するとき、次に条件を満足することを特徴とする偏心プリズム光学系。
０．７＜ＦＡ＜１．３ ・・・（Ａ−１）
ただし、前記軸上主光線と平行に瞳中心からＸ軸方向に微小量Ｈの点を通り、その軸上主光線と平行に前記光学系に入射する光線を光線追跡したときの射出光線のＮＡ（軸上主光線となす角のｓｉｎの値）を前記Ｈで割った値を光学系全体のＸ方向の焦点距離Ｆｘとし、また、瞳中心からＹ方向にＨの点を通り、その軸上主光線と平行に前記光学系に入射する光線を光線追跡したときの射出光線のＮＡ（軸上主光線となす角のｓｉｎの値）を前記Ｈで割った値を光学系全体のＹ方向の焦点距離Ｆｙと定義し、Ｆｘ／ＦｙをＦＡとする。3. The decentered prism optical system according to claim 1,
A decentered prism optical system characterized by satisfying the following conditions: the Z-axis is defined as an axis defined by the straight line of an axial chief ray that passes through the center of the pupil of the decentered prism optical system, reaches the center of the image plane, exits the pupil, and intersects with the first surface; the Y-axis is defined as an axis that is perpendicular to the Z-axis and within the decentered surfaces of each surface that constitutes the decentered prism optical system; and the X-axis is defined as an axis that is perpendicular to the Z-axis and perpendicular to the Y-axis.
0.7<FA<1.3...(A-1)
Here, when a ray of light is traced from the center of the pupil in the X-axis direction, passing through a point H at an infinitesimal distance in the X-axis direction, and entering the optical system parallel to the axial chief ray, the NA of the exiting ray (the sine value of the angle with the axial chief ray) is divided by H, which is defined as the focal length Fx of the entire optical system in the X direction; when a ray of light is traced from the center of the pupil in the Y direction, passing through point H, and entering the optical system parallel to the axial chief ray, the NA of the exiting ray (the sine value of the angle with the axial chief ray) is divided by H, which is defined as the focal length Fy of the entire optical system in the Y direction; and Fx/Fy is defined as FA.
前記偏心プリズム光学系の瞳の中心を通り、像面中心に到達する軸上主光線が瞳を射出し前記第１面に交差するまでの直線によって定義される軸をＺ軸とし、このＺ軸と直交しかつ前記偏心プリズム光学系を構成する各面の偏心面内の軸をＹ軸と定義し、Ｚ軸と直交しかつＹ軸と直交する軸をＸ軸と定義するとき、次に条件を満足することを特徴とする偏心プリズム光学系。
０．８＜｜ＰｘＢ｜＜１．３ ・・・（Ｂ−１）
ただし、前記軸上主光線と平行に瞳中心からＸ軸方向に微小量Ｈの点を通り、その軸上主光線と平行に前記光学系に入射する光線を光線追跡したときの射出光線のＮＡ（軸上主光線となす角のｓｉｎの値）を前記Ｈで割った値を光学系全体のＸ方向の焦点距離Ｆｘとし、また、瞳中心からＹ方向にＨの点を通り、その軸上主光線と平行に前記光学系に入射する光線を光線追跡したときの射出光線のＮＡ（軸上主光線となす角のｓｉｎの値）を前記Ｈで割った値を光学系全体のＹ方向の焦点距離Ｆｙと定義し、前記軸上主光線が前記第２面に当たる位置での面のＸ方向、Ｙ方向の屈折力（パワー）をそれぞれＰｘｎ、Ｐｙｎとし、前記Ｘ方向の焦点距離Ｆｘ、Ｙ方向の焦点距離Ｆｙの逆数をそれぞれＰｘ、Ｐｙとし、Ｐｘｎ／ＰｘをＰｘＢとする。3. The decentered prism optical system according to claim 1,
A decentered prism optical system characterized by satisfying the following conditions: the Z-axis is defined as an axis defined by the straight line of an axial chief ray that passes through the center of the pupil of the decentered prism optical system, reaches the center of the image plane, exits the pupil, and intersects with the first surface; the Y-axis is defined as an axis that is perpendicular to the Z-axis and within the decentered surfaces of each surface that constitutes the decentered prism optical system; and the X-axis is defined as an axis that is perpendicular to the Z-axis and perpendicular to the Y-axis.
0.8<|PxB|<1.3...(B-1)
Here, the focal length Fx in the X direction of the entire optical system is defined as the value obtained by ray tracing a ray of light parallel to the axial chief ray, passing from the center of the pupil in the X-axis direction through a point H by an infinitesimal amount, and entering the optical system parallel to the axial chief ray (NA of the exiting ray (sine value of the angle with the axial chief ray) divided by H); and the focal length Fy in the Y direction of the entire optical system is defined as the value obtained by ray tracing a ray of light parallel to the axial chief ray, passing from the center of the pupil in the Y direction through a point H, and entering the optical system parallel to the axial chief ray (NA of the exiting ray (sine value of the angle with the axial chief ray) divided by H; the refractive powers (powers) in the X direction and the Y direction of the surface at the position where the axial chief ray hits the second surface are defined as Pxn and Pyn, respectively; the reciprocals of the focal length Fx in the X direction and the focal length Fy in the Y direction are defined as Px and Py, respectively; and Pxn/Px is defined as PxB.
前記偏心プリズム光学系の瞳の中心を通り、像面中心に到達する軸上主光線が瞳を射出し前記第１面に交差するまでの直線によって定義される軸をＺ軸とし、このＺ軸と直交しかつ前記偏心プリズム光学系を構成する各面の偏心面内の軸をＹ軸と定義し、Ｚ軸と直交しかつＹ軸と直交する軸をＸ軸と定義するとき、次に条件を満足することを特徴とする偏心プリズム光学系。
０．８＜｜ＰｙＣ｜＜１．３ ・・・（Ｃ−１）
ただし、前記軸上主光線と平行に瞳中心からＸ軸方向に微小量Ｈの点を通り、その軸上主光線と平行に前記光学系に入射する光線を光線追跡したときの射出光線のＮＡ（軸上主光線となす角のｓｉｎの値）を前記Ｈで割った値を光学系全体のＸ方向の焦点距離Ｆｘとし、また、瞳中心からＹ方向にＨの点を通り、その軸上主光線と平行に前記光学系に入射する光線を光線追跡したときの射出光線のＮＡ（軸上主光線となす角のｓｉｎの値）を前記Ｈで割った値を光学系全体のＹ方向の焦点距離Ｆｙと定義し、前記軸上主光線が前記第２面に当たる位置での面のＸ方向、Ｙ方向の屈折力（パワー）をそれぞれＰｘｎ、Ｐｙｎとし、前記Ｘ方向の焦点距離Ｆｘ、Ｙ方向の焦点距離Ｆｙの逆数をそれぞれＰｘ、Ｐｙとし、Ｐｙｎ／ＰｙをＰｙＣとする。3. The decentered prism optical system according to claim 1,
A decentered prism optical system characterized by satisfying the following conditions: the Z-axis is defined as an axis defined by the straight line of an axial chief ray that passes through the center of the pupil of the decentered prism optical system, reaches the center of the image plane, exits the pupil, and intersects with the first surface; the Y-axis is defined as an axis that is perpendicular to the Z-axis and within the decentered surfaces of each surface that constitutes the decentered prism optical system; and the X-axis is defined as an axis that is perpendicular to the Z-axis and perpendicular to the Y-axis.
0.8<|PyC|<1.3...(C-1)
Here, the focal length Fx in the X direction of the entire optical system is defined as the value obtained by ray tracing a ray of light parallel to the axial chief ray, passing from the center of the pupil in the X-axis direction through a point H that is infinitesimal, and entering the optical system parallel to the axial chief ray, dividing the NA (sine value of the angle with the axial chief ray) of the exiting ray by H; and the focal length Fy in the Y direction of the entire optical system is defined as the value obtained by ray tracing a ray of light parallel to the axial chief ray, passing from the center of the pupil in the Y direction through a point H, and entering the optical system parallel to the axial chief ray, dividing the NA (sine value of the angle with the axial chief ray) of the exiting ray by H; the refractive powers (powers) of the surface in the X direction and the Y direction at the position where the axial chief ray hits the second surface are defined as Pxn and Pyn, respectively; the reciprocals of the focal length Fx in the X direction and the focal length Fy in the Y direction are defined as Px and Py, respectively; and Pyn/Py is defined as PyC.
前記偏心プリズム光学系の瞳の中心を通り、像面中心に到達する軸上主光線が瞳を射出し前記第１面に交差するまでの直線によって定義される軸をＺ軸とし、このＺ軸と直交しかつ前記偏心プリズム光学系を構成する各面の偏心面内の軸をＹ軸と定義し、Ｚ軸と直交しかつＹ軸と直交する軸をＸ軸と定義するとき、次に条件を満足することを特徴とする偏心プリズム光学系。
０．８＜ＣｘｙＤ＜１．２ ・・・（Ｄ−１）
ただし、前記軸上主光線が前記第２面に当たる位置でのその面の法線を含むＸ方向の曲率Ｃｘ２、Ｙ方向の曲率Ｃｙ２との比Ｃｘ２／Ｃｙ２をＣｘｙＤとする。3. The decentered prism optical system according to claim 1,
A decentered prism optical system characterized by satisfying the following conditions: the Z-axis is defined as an axis defined by the straight line of an axial chief ray that passes through the center of the pupil of the decentered prism optical system, reaches the center of the image plane, exits the pupil, and intersects with the first surface; the Y-axis is defined as an axis that is perpendicular to the Z-axis and within the decentered surfaces of each surface that constitutes the decentered prism optical system; and the X-axis is defined as an axis that is perpendicular to the Z-axis and perpendicular to the Y-axis.
0.8<CxyD<1.2...(D-1)
Here, the ratio Cx2/Cy2 of the curvature Cx2 in the X direction including the normal to the second surface at the position where the axial chief ray strikes the surface to the curvature Cy2 in the Y direction is defined as CxyD.
前記光学系に入射した光束を射出させる透過作用と前記光学系内部で前記光束を折り曲げる反射作用とを併せ持つ回転対称面で形成された第１面と、
前記第１面と対向して配置され、前記光学系に入射し光束を前記光学系内部で前記第１面に向けて反射させる作用を有する回転非対称面で形成された第２面と、
前記像面に対して面を対向するように配置し、前記像面から射出した光束を前記光学系内部に入射させる作用を有する第３面とを少なくとも有し、
前記第３面は、前記第１面と前記第２面との対向方向に対して略垂直方向の位置に配置され、
前記第１面は、前記第２面の方向に凸面を向けた形状で構成され、
少なくとも前記第３面から入射した光束は前記光学系内部を通過して前記第１面で反射され、前記第１面で反射された光束は前記光学系内部を通過して前記第２面で反射され、前記第２面で反射された光束は前記第２面と対向する第１面から射出瞳に向けて射出されるように、前記第１面と前記第２面と前記第３面とが前記光学系を構成する面として配置され、さらに、
光線の折り返し方向であるＹ−Ｚ断面内で、前記光学系の像面の中心を通り射出瞳中心に到達する軸上主光線が前記第１面を射出して前記射出瞳に入射するまでの直線を境にして、その直線に沿う方向の前記射出瞳からの前記第１面までの距離が、前記像面側の方が前記像面と反対側より小さくなるように、前記第１面が前記直線に対して傾いて配置されていることを特徴とする偏心プリズム光学系。A decentered prism optical system has at least three surfaces arranged decentered from one another, and the spaces between the surfaces are filled with a transparent medium having a refractive index of 1.3 or more, and receives a light beam emitted from an image plane to form an exit pupil,
a first surface formed by a rotationally symmetric surface that has both a transmitting action for causing a light beam incident on the optical system to exit and a reflecting action for bending the light beam within the optical system;
a second surface formed of a rotationally asymmetric surface that is disposed opposite the first surface and that has the effect of reflecting a light beam that has entered the optical system toward the first surface within the optical system;
a third surface that is disposed so as to face the image plane and that has the effect of causing a light beam that has emerged from the image plane to enter the optical system;
the third surface is disposed at a position substantially perpendicular to the opposing direction of the first surface and the second surface,
the first surface is configured with a shape that faces a convex surface toward the second surface,
the first surface, the second surface, and the third surface are arranged as surfaces constituting the optical system such that at least a light beam incident from the third surface passes through the interior of the optical system and is reflected by the first surface, the light beam reflected by the first surface passes through the interior of the optical system and is reflected by the second surface, and the light beam reflected by the second surface is emitted from a first surface opposite to the second surface toward an exit pupil; and
a first surface disposed at an angle relative to a straight line in a Y-Z cross section, which is a direction in which a light ray is folded back, the straight line being the boundary of an axial chief ray that passes through the center of an image plane of the optical system and arrives at the center of an exit pupil, the first surface being incident on the exit pupil, and the distance from the exit pupil to the first surface in a direction along the straight line is smaller on the image plane side than on the opposite side to the image plane.
前記瞳面に対して面を対向するように配置され、前記瞳面から射出した光束を前記光学系内部に入射させる透過作用と前記光学系内部で前記光束を折り曲げる反射作用とを併せ持つ回転対称面で形成された第１面と、
前記第１面と対向して配置され、前記光学系に入射し光束を前記光学系内部で前記第１面に向けて反射させる作用を有する回転非対称面で形成された第２面と、
前記第１面と前記第２面との対向方向に対して略垂直方向の位置に配置され、前記光学系に入射した光束を前記像面に向けて射出させる透過作用を有する第３面とを少なくとも有し、
前記第１面は、前記第２面の方向に凸面を向けた形状で構成され、
少なくとも前記第１面から入射した光束は前記第１面と対向する第２面で反射され、前記第２面で反射された光束は前記第２面と対向する前記第１面で反射され、前記第１面で反射された光束は前記光学系内部を通過して前記第３面から像面に向けて射出されるように、前記第１面と前記第２面と前記第３面とが前記光学系を構成する面として配置され、さらに、
光線の折り返し方向であるＹ−Ｚ断面内で、前記光学系の瞳面の中心を通り像面中心に到達する軸上主光線が瞳面を射出して前記第１面と交差するまでの直線を境にして、その直線に沿う方向の前記瞳面からの前記第１面までの距離が、前記像面側の方が前記像面と反対側より小さくなるように、前記第１面が前記直線に対して傾いて配置されていることを特徴とする偏心プリズム光学系。A decentered prism optical system has at least three surfaces that are decentered from one another, and the spaces between the surfaces are filled with a transparent medium having a refractive index of 1.3 or more, and receives a light beam incident from a pupil plane to form an image plane,
a first surface formed by a rotationally symmetric surface that is arranged to face the pupil plane and has both a transmitting action that causes a light beam that has emerged from the pupil plane to enter the optical system and a reflecting action that bends the light beam within the optical system;
a second surface formed of a rotationally asymmetric surface that is disposed opposite the first surface and that has the effect of reflecting a light beam that has entered the optical system toward the first surface within the optical system;
a third surface that is disposed at a position substantially perpendicular to the opposing direction of the first surface and the second surface and has a transmitting action that causes a light beam that has entered the optical system to exit toward the image plane,
the first surface is configured with a shape that faces a convex surface toward the second surface,
the first surface, the second surface, and the third surface are arranged as surfaces that constitute the optical system such that at least the light beam incident from the first surface is reflected by a second surface that faces the first surface, the light beam reflected by the second surface is reflected by the first surface that faces the second surface, and the light beam reflected by the first surface passes through the inside of the optical system and is emitted from the third surface toward an image plane; and
a first surface disposed at an angle relative to a straight line in a Y-Z cross section, which is a direction in which a light ray is folded back, the straight line being the boundary of an axial chief ray that passes through the center of a pupil surface of the optical system and arrives at the center of an image surface, the first surface being the boundary, and the distance from the pupil surface to the first surface in a direction along the straight line is smaller on the image surface side than on the opposite side to the image surface.
Priority Applications (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9025135A JPH10221602A (en) | 1997-02-07 | 1997-02-07 | Eccentric prism optical system |
| US08/805,465 US6034823A (en) | 1997-02-07 | 1997-02-25 | Decentered prism optical system |
| EP97107235A EP0857992B1 (en) | 1997-02-07 | 1997-04-30 | Decentered prism optical system |
| DE69719949T DE69719949T2 (en) | 1997-02-07 | 1997-04-30 | Optical system with decentered prism |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9025135A JPH10221602A (en) | 1997-02-07 | 1997-02-07 | Eccentric prism optical system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH10221602A JPH10221602A (en) | 1998-08-21 |
| JPH10221602A5 true JPH10221602A5 (en) | 2004-12-24 |
Family
ID=12157533
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP9025135A Pending JPH10221602A (en) | 1997-02-07 | 1997-02-07 | Eccentric prism optical system |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH10221602A (en) |
-
1997
- 1997-02-07 JP JP9025135A patent/JPH10221602A/en active Pending
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