Abstract: An attaching and detaching apparatus includes a main mounting plate to which a main mounting object is to be mounted, an attachment mounting plate to which an attachment mounting object is to be mounted, and a connecting member between the main mounting plate and the attachment mounting plate. A protrusion projecting toward the connecting member is formed on the main mounting plate. A hole into which the protrusion fits is formed on the connecting member. A first contact surface in the shape of a surface of revolution is formed on the protrusion. A second contact surface in the shape of a surface of revolution is formed on the inner surface of the hole. The first contact surface and the second contact surface are in contact with each other with the central axis of the protrusion coinciding with the central axis of the hole.

Abstract: A machining head capable of coping with impacts from different directions with a simple configuration of one buffer, and a three-dimensional laser processing machine using the machining head. A machining head having a multi-axis structure that rotatably supports orientation of a tip that emits a laser beam used for a three-dimensional laser processing machine according to the present disclosure includes a buffer in an arm that forms a predetermined angle with a direction in which a laser beam is emitted. The buffer includes: a first coupler that includes a first coupling surface provided near a tip; a second coupler that includes a second coupling surface facing the first coupling surface; and a coupling member that couples the first coupling surface and the second coupling surface 3b. When the tip is collided with a collision force, the first coupling surface and the second coupling surface are separated.

Abstract: An attaching and detaching apparatus includes a main mounting plate to which a main mounting object is to be mounted, an attachment mounting plate to which an attachment mounting object is to be mounted, and a connecting member between the main mounting plate and the attachment mounting plate. A protrusion projecting toward the connecting member is formed on the main mounting plate. A hole into which the protrusion fits is formed on the connecting member. A first contact surface in the shape of a surface of revolution is formed on the protrusion. A second contact surface in the shape of a surface of revolution is formed on the inner surface of the hole. The first contact surface and the second contact surface are in contact with each other with the central axis of the protrusion coinciding with the central axis of the hole.

Abstract: An identification sheet (X1) according to the present invention includes a backing sheet (10) and a pressure-sensitive adhesive sheet (20). The backing sheet (10) bears a distinguishing mark (M1). The pressure-sensitive adhesive sheet (20) has a multilayer structure including a substrate layer (21) and a pressure-sensitive adhesive layer (22). The pressure-sensitive adhesive layer (22) is removably attachable to the backing sheet (10). The pressure-sensitive adhesive sheet (20) bears a distinguishing mark (M2). The identification sheet (X1) as above is suitable for keeping on surely providing the admissibility of evidence of a collected target material to be identified.

Abstract: An image pickup lens includes in order from an object side, a front lens unit having a positive refractive power, one focusing lens unit having a positive refractive power, and a rear lens unit having a negative refractive power, wherein at the time of focusing, the focusing lens moves on an optical axis, and a single lens having a positive refractive power is disposed nearest to an object in the rear lens unit.

Abstract: A zoom lens includes, in order from the object side, a first lens unit having negative refractive power, a second lens unit having positive refractive power, a third lens unit having negative refractive power, and a fourth lens unit having positive refractive power. At a time of zooming from a wide-angle end to a telephoto end, the distance between the first lens unit and the second lens unit is reduced, the distance between the third lens unit and the fourth lens unit is increased, and the fourth lens unit is fixed.

Abstract: An identification sheet (X1) according to the present invention includes a backing sheet (10) and a pressure-sensitive adhesive sheet (20). The backing sheet (10) bears a distinguishing mark (M1). The pressure-sensitive adhesive sheet (20) has a multilayer structure including a substrate layer (21) and a pressure-sensitive adhesive layer (22). The pressure-sensitive adhesive layer (22) is removably attachable to the backing sheet (10). The pressure-sensitive adhesive sheet (20) bears a distinguishing mark (M2). The identification sheet (X1) as above is suitable for keeping on surely providing the admissibility of evidence of a collected target material to be identified.

Abstract: An identification sheet (X1) according to the present invention includes a pressure-sensitive adhesive sheet (20) including a pressure-sensitive adhesive layer (22). The pressure-sensitive adhesive layer (22) contains a polyester polyurethane as a principal component. The polyester polyurethane is typically a polyester-polyether polyurethane. The identification pressure-sensitive sheet (X1) is suitable for resisting thermal deformation in the pressure-sensitive adhesive layer (22).

Abstract: A zoom lens includes, in order from the object side, a first lens unit having negative refractive power, a second lens unit having positive refractive power, a third lens unit having negative refractive power, and a fourth lens unit having positive refractive power. At a time of zooming from a wide-angle end to a telephoto end, the distance between the first lens unit and the second lens unit is reduced, the distance between the third lens unit and the fourth lens unit is increased, the fourth lens unit is fixed, and Conditional Expressions (1) and (2) below are satisfied: 2.5?f2/fw4.5??(1), and 4.3??2GWT/fw?8.0??(2).

Abstract: A wide angle lens includes in order from an object side, a front lens unit having a positive refractive power, one focusing lens having a negative refractive power, and a rear lens unit having a positive refractive power, and at the time of focusing, the focusing lens moves on an optical axis, and the following conditional expressions (1) and (2) are satisfied. 0.1<f1/SSD<0.5??(1) 3.

Abstract: A lens barrel of the present invention is a lens barrel holding a photographing optical system which is a zoom lens constituted by five groups and includes: a cylindrical cam barrel arranged to be rotatable around an optical axis; a first lens driving section driving the cam barrel around the optical axis; a plurality of first cam grooves carved on an outer circumferential surface of the cam barrel; and a plurality of second cam grooves carved on an inner circumferential surface of the cam barrel. A first lens group holding barrel has a plurality of cam followers that are recessed in the first cam grooves; and each of a second lens group holding barrel and a third lens group holding barrel has a plurality of cam followers that are recessed in the second cam grooves.

Abstract: A zoom lens comprises a first lens unit G1 having a positive refractive power, a second lens unit G2 having a negative refractive power, and a plurality of lens units G3 and G4. Zooming from a wide angle end to a telephoto end is carried out by changing a distance between the lens units. One of the first lens unit G1 and the second lens unit G2 has, or both the first lens unit G1 and the second lens unit G2 have a specific arrangement.

Abstract: A laser processing device including: a laser oscillator; a processing table; a transmission optical system for transmitting laser light emitted from the laser oscillator to the processing table; a processing head for condensing and radiating the laser light transmitted via the transmission optical system to an object to be processed; a moving mechanism for changing a relative position between the object to be processed and the laser light to be radiated to the object to be processed; and a variable curvature spherical mirror. The transmission optical system includes a reflective beam expander mechanism for collimating and magnifying the laser light from the laser oscillator. The reflective beam expander mechanism includes a spherical mirror and a concave mirror having different curvatures in two orthogonal axes.

Abstract: An image pickup lens includes in order from an object side, a front lens unit having a positive refractive power, one focusing lens unit having a positive refractive power, and a rear lens unit having a negative refractive power, wherein at the time of focusing, the focusing lens moves on an optical axis, and a single lens having a positive refractive power is disposed nearest to an object in the rear lens unit.

Abstract: A laser processing device including: a laser oscillator; a processing table; a transmission optical system for transmitting laser light emitted from the laser oscillator to the processing table; a processing head for condensing and radiating the laser light transmitted via the transmission optical system to an object to be processed; a moving mechanism for changing a relative position between the object to be processed and the laser light to be radiated to the object to be processed; and a variable curvature spherical mirror. The transmission optical system includes a reflective beam expander mechanism for collimating and magnifying the laser light from the laser oscillator. The reflective beam expander mechanism includes a spherical mirror and a concave mirror having different curvatures in two orthogonal axes.

Abstract: A wide angle lens includes in order from an object side, a front lens unit having a positive refractive power, one focusing lens having a negative refractive power, and a rear lens unit having a positive refractive power, and at the time of focusing, the focusing lens moves on an optical axis, and the following conditional expressions (1) and (2) are satisfied. 0.1<f1/SSD<0.5??(1) 3.

Abstract: A zoom lens consists of, in order from the object side, a first lens unit having a positive refractive power, a second lens unit having a negative refractive power, a third lens unit having a positive refractive power, a fourth lens unit having a negative refractive power, and a fifth lens unit having a positive refractive power. The first lens unit and the second lens unit move during zooming from the wide angle end to the telephoto end. The zoom lens satisfies the following conditional expressions (1), (2), and (3): ft/fw>6.0??(1), Fno(T)<3.5??(2),and ?d/ft<0.6??(3).

Abstract: A curvature variable mirror includes a mirror base material that is configured such that the curvature is variable and that reflects laser light on the mirror reflective surface side, wherein the mirror base material is formed by using spring-material copper alloy, and the spring-material copper alloy is constituted by using any of phosphor bronze, copper-nickel-zinc alloy, chromium copper, zirconium copper, titanium copper alloy, copper-nickel alloy, and alloy obtained by adding at least one of Ni (nickel), Sn (tin), Si (silicone), Mg (magnesium), Zn (zinc), Mn (manganese), Pb (lead), Fe (iron), and Al (aluminum) to copper.

Abstract: A laser processing device including: a laser oscillator; a processing table; a transmission optical system for transmitting laser light emitted from the laser oscillator to the processing table; a processing head for condensing and radiating the laser light transmitted via the transmission optical system to an object to be processed; a moving mechanism for changing a relative position between the object to be processed and the laser light to be radiated to the object to be processed; and a variable curvature spherical mirror. The transmission optical system includes a reflective beam expander mechanism for collimating and magnifying the laser light from the laser oscillator. The reflective beam expander mechanism includes a spherical mirror and a concave mirror having different curvatures in two orthogonal axes.

Abstract: A zoom lens comprises a first lens unit G1 having a positive refractive power, a second lens unit G2 having a negative refractive power, and a plurality of lens units G3 and G4. Zooming from a wide angle end to a telephoto end is carried out by changing a distance between the lens units. One of the first lens unit G1 and the second lens unit G2 has, or both the first lens unit G1 and the second lens unit G2 have a specific arrangement.