Abstract: Provided is an eyepiece optical system including at least three lenses disposed in order from an observation object (Ob) along an optical axis. A final lens disposed closest to an eye point (EP) (corresponds to the third lens (L3) in FIG. 1) is fixed when adjusting the diopter, and the following conditional expressions (1) and (2) are satisfied: 2.2<|fe/fa<6.0??(1) 0.5<|Re2/fa|<5.0??(2) where fe denotes a focal length of the final lens, fa denotes a focal length of the total eyepiece optical system (EL), and Re2 denotes a radius of curvature of the eye point (EP) side lens surface of the final lens. When an optical surface is aspherical, a paraxial radius of curvature is used for calculation.

Abstract: The invention provides a hydraulic lash adjuster equipped with a cost effective dropout preventing mechanism for preventing a plunger from dropping out of a housing. The lash adjuster comprises: a cylindrical bottomed housing (3), a plunger (2), housed inside the housing (3), having an outer periphery in contact with the inner periphery of the housing (3), and a dropout preventing mechanism (14). The dropout preventing mechanism (14) comprises a first groove (11) formed in the inner circumferential periphery of the housing (3) and a second groove (12) formed in the outer circumferential periphery of the plunger (2) in opposition to the first groove (11), and a flexible linear member 4 disposed in the first and the second grooves (11) and (12).

Abstract: Provided is an eyepiece optical system including at least three lenses disposed in order from an observation object (Ob) along an optical axis. A final lens disposed closest to an eye point (EP) (corresponds to the third lens (L3) in FIG. 1) is fixed when adjusting the diopter, and the following conditional expressions (1) and (2) are satisfied: 2.2<|fe/fa<6.0??(1) 0.5<|Re2/fa|<5.0??(2) where fe denotes a focal length of the final lens, fa denotes a focal length of the total eyepiece optical system (EL), and Re2 denotes a radius of curvature of the eye point (EP) side lens surface of the final lens. When an optical surface is aspherical, a paraxial radius of curvature is used for calculation.

Abstract: Provided is an eyepiece optical system including at least three lenses disposed in order from an observation object (Ob) along an optical axis. A final lens disposed closest to an eye point (EP) (corresponds to the third lens (L3) in FIG. 1) is fixed when adjusting the diopter, and the following conditional expressions (1) and (2) are satisfied: 2.2<|fe/fa|<6.0??(1) 0.5<|Re2/fa|<5.0??(2) where fe denotes a focal length of the final lens, fa denotes a focal length of the total eyepiece optical system (EL), and Re2 denotes a radius of curvature of the eye point (EP) side lens surface of the final lens. When an optical surface is aspherical, a paraxial radius of curvature is used for calculation.

Abstract: An electronic device having an attachment part that attaches/detaches the electronic device to/from a predetermined member; a physical quantity sensor detecting a physical quantity affecting the predetermined member according to a movement of a human body; and a communication unit configured to communicate with an external device and transmit the physical quantity detected by the physical quantity sensor to the external device.

Abstract: An image processing device includes: an image processing unit that alters an image by executing first image processing and second image processing on the image; and a processing change unit that changes an extent to which the image is altered through the first image processing and an extent to which the image is altered through the second image processing. The processing change unit raises the extent to which the image is altered through the second image processing when the extent to which the image is altered through the first image processing is lowered.

Abstract: To improve the usability of an electronic device, the electronic device includes: a first communication unit located near a user; a receive unit configured to receive data through communication via a body of the user or near field communication between a second communication unit located in a member used by the user and the first communication unit; and a recording unit configured to record data pertaining to the member when communication is established between the first communication unit and the second communication unit.

Abstract: An image processing device includes: an image processing unit that alters an image by executing first image processing and second image processing on the image; and a processing change unit that changes an extent to which the image is altered through the first image processing and an extent to which the image is altered through the second image processing. The processing change unit raises the extent to which the image is altered through the second image processing when the extent to which the image is altered through the first image processing is lowered.

Abstract: In a lash adjuster used for a valve operating mechanism of an internal combustion engine, there is known a lash adjuster constituted by inserting a cylindrical sleeve into a plunger cap for preventing air from entering a high-pressure chamber located at a lower portion of the lash adjuster. However, in the conventional lash adjuster, since the plunger cap is formed with two side holes which are different in height in the axial direction of the plunger cap, it becomes complicated to regulate the side surface the plunger cap which corresponds to a sliding surface. Therefore, it is problems to be solved by the present invention to provide a lash adjuster in which the side surface of the plunger cap can be easily regulated without disturbing the inflow and outflow of oil and whose machining cost can be kept low. The above problems can be solved by a hydraulic lash adjuster in which two or more cap side holes 27c are provided and all of them are disposed in a plane perpendicular to a shaft center of the body 21.

Abstract: The present invention provides a DLC (diamond like carbon) film coating and a coated valve lifter, wherein the DLC film coating can be formed at a film forming rate comparable with that achieved in the case of forming the DLC coating film by the CVD (chemical vapor deposition) method and has good durability comparable with that obtained in the case of forming the DLC film coating by the sputtering film forming method. The DLC film coating includes an intermediate layer 3 deposited on the surface of a base substrate and a DLC layer 4 deposited on the intermediate layer 3. The intermediate layer 3 is formed of metal carbide or metal capable of forming a hard surface and the DLC layer 4 is formed by adding a common metal element to that contained in the intermediate layer 3 thereto while inert gas containing hydrocarbon gas is being introduced.

Abstract: In a lash adjuster used for a valve operating mechanism of an internal combustion engine, there is known a lash adjuster constituted by inserting a cylindrical sleeve into a plunger cap for preventing air from entering a high-pressure chamber located at a lower portion of the lash adjuster. However, in the conventional lash adjuster, since the plunger cap is formed with two side holes which are different in height in the axial direction of the plunger cap, it becomes complicated to regulate the side surface the plunger cap which corresponds to a sliding surface. Therefore, it is problems to be solved by the present invention to provide a lash adjuster in which the side surface of the plunger cap can be easily regulated without disturbing the inflow and outflow of oil and whose machining cost can be kept low. The above problems can be solved by a hydraulic lash adjuster in which two or more cap side holes 27c are provided and all of them are disposed in a plane perpendicular to a shaft center of the body 21.

Abstract: Providing an eyepiece optical system 10 comprising: an eyepiece system 11; and an optical member 12 having a meniscus shape disposed to an eye side of the eyepiece system 11, the following conditional expression being satisfied: 2.00<|R|/fe<22.00 where fe denotes a focal length of the eyepiece system 11 when a diopter of the eyepiece system 11 is 0 (m?1), and R denotes a radius of curvature of the surface having the meniscus shape, and the optical member 12 with a meniscus shape having a concave surface facing the eye side.

Abstract: An image processing device includes: an image processing unit that alters an image by executing first image processing and second image processing on the image; and a processing change unit that changes an extent to which the image is altered through the first image processing and an extent to which the image is altered through the second image processing. The processing change unit raises the extent to which the image is altered through the second image processing when the extent to which the image is altered through the first image processing is lowered.

Abstract: The invention provides a hydraulic lash adjuster equipped with a cost effective dropout preventing mechanism for preventing a plunger from dropping out of a housing. The lash adjuster comprises: a cylindrical bottomed housing (3), a plunger (2), housed inside the housing (3), having an outer periphery in contact with the inner periphery of the housing (3), and a dropout preventing mechanism (14). The dropout preventing mechanism (14) comprises a first groove (11) formed in the inner circumferential periphery of the housing (3) and a second groove (12) formed in the outer circumferential periphery of the plunger (2) in opposition to the first groove (11), and a flexible linear member 4 disposed in the first and the second grooves (11) and (12).

Abstract: To improve the usability of an electronic device, the electronic device includes: a first communication unit located near a user; a receive unit configured to receive data through communication via a body of the user or near field communication between a second communication unit located in a member used by the user and the first communication unit; and a recording unit configured to record data pertaining to the member when communication is established between the first communication unit and the second communication unit.

Abstract: To improve the usability of an electronic device, the electronic device includes: a first communication unit located near a user; a receive unit configured to receive data through communication via a body of the user or near field communication between a second communication unit located in a member used by the user and the first communication unit; and a recording unit configured to record data pertaining to the member when communication is established between the first communication unit and the second communication unit.

Abstract: [Problems to be Solved] The present invention provides a DLC (diamond like carbon) film coating and a coated valve lifter, wherein the DLC film can be formed at a film forming rate comparable with that achieved in the case of forming the DLC coating film by the CVD (chemical vapor deposition) method and has good durability comparable with that obtained in the case of forming the DLC film coating by the sputtering film forming method. [Solution] The DLC film coating includes an intermediate layer 3 deposited on the surface of a base substrate and a DLC layer 4 deposited on the intermediate layer 3. The intermediate layer 3 is formed of metal carbide or metal capable of forming a hard surface and the DLC layer 4 is formed by adding a common metal element to that contained in the intermediate layer 3 thereto while inert gas containing hydrocarbon gas is being introduced.

Abstract: The mechanical lash adjuster is arranged between a cam and one end of the stem of a valve urged by a valve spring. The lash adjuster comprises an unrotatable housing having a thread, a plunger subjected to the force of the cam and formed with a thread in engagement with the thread of the housing, and a plunger spring urging the plunger against the action of the valve spring. The lead and flank angles of the engaging threads are set such that the engagement threads can slidably rotate under a given shaft load applied to the plunger unless the frictional torque TB, generated by the friction between the slidable frictional surface F2 of the plunger and a shaft load transmission member to act on the plunger, exceeds the thrust torque TF imparted by the shaft load to the plunger.

Abstract: Provided is an eyepiece optical system including at least three lenses disposed in order from an observation object (Ob) along an optical axis. A final lens disposed closest to an eye point (EP) (corresponds to the third lens (L3) in FIG. 1) is fixed when adjusting the diopter, and the following conditional expressions (1) and (2) are satisfied: 2.2<|fe/fa|<6.0??(1) 0.5<|Re2/fa|<5.0??(2) where fe denotes a focal length of the final lens, fa denotes a focal length of the total eyepiece optical system (EL), and Re2 denotes a radius of curvature of the eye point (EP) side lens surface of the final lens. When an optical surface is aspherical, a paraxial radius of curvature is used for calculation.

Abstract: The mechanical lash adjuster is arranged between a cam and one end of the stem of a valve urged by a valve spring. The lash adjuster comprises an unrotatable housing having a thread, a plunger subjected to the force of the cam and formed with a thread in engagement with the thread of the housing, and a plunger spring urging the plunger against the action of the valve spring. The lead and flank angles of the engaging threads are set such that the engagement threads can slidably rotate under a given shaft load applied to the plunger unless the frictional torque TB, generated by the friction between the slidable frictional surface F2 of the plunger and a shaft load transmission member to act on the plunger, exceeds the thrust torque TF imparted by the shaft load to the plunger.