An endoscope optical system unit according to the present invention, includes, an endoscope illuminating optical system which includes, a light-emitting section, and a first optical-path deflecting prism group which takes in illumination light emitted from the light-emitting section, and irradiates light to a subject upon deflecting an optical path, and the first optical-path deflecting prism group includes three prisms in order from an object side which are, a first prism, a second prism, and a third prism, and the first prism, the second prism, and the third prism are disposed to be mutually adjacent, and a direction of irradiation of the illumination light is let to be variable to a first direction by rotationally moving the first prism with respect to the second prism, and the direction of irradiation of the illumination light is let to be variable to a second direction which differs from the first direction, by rotationally moving the first prism and the second prism integrally, with respect to the third prism; and an endoscope objective optical system, wherein the endoscope objective optical system includes a second optical-path deflecting prism group, and a lens group, and the second optical-path deflecting prism group includes three prisms in order from the subject side, a fourth prism, a fifth prism, and a sixth prism, and the fourth prism, the fifth prism, and the sixth prism are disposed to be mutually adjacent, and a visual field direction is let to be variable to the first direction by rotationally moving the fourth prism with respect to the fifth prism, and the visual field direction is let to be variable to the second direction which differs from the first direction, by rotationally moving the fourth prism and the fifth prism integrally, with respect to the sixth prism, and the first optical-path deflecting prism group and the second optical-path deflecting prism group are disposed such that a third axis of rotation when the fourth prism rotates with respect to the fifth prism, and a first axis of rotation when the first prism of the endoscope illuminating optical system rotates with respect to the second prism, become coaxial, and the first optical-path deflecting prism group and the second optical-path deflecting prism group are disposed such that a fourth axis of rotation when the fourth prism and the fifth prism rotate integrally with respect to the sixth prism, and a second axis of rotation when the first prism and the second prism rotate integrally with respect to the third prism, become coaxial, and both the visual field direction of the endoscope objective optical system and the direction of irradiation of the illumination light of t

A signal processing device includes: a connection detector that detects whether an endoscope including one or more operation members is connected; an input unit to which an operation state signal is input from an external input device including one or more buttons that correspond to the one or more operation members included in the endoscope when the endoscope is not connected; and an operation execution unit that executes an operation according to the operation state signal that is input to the input unit.

There is provided an endoscope objective optical system which enables to change a field of view to an arbitrary direction without bending an endoscope, even in a narrow space.

The endoscope objective optical system includes an optical-path deflecting prism group, and a lens group, wherein, a visual-field direction of the endoscope objective optical system is let to be variable by moving a prism in the optical-path deflecting prism group, and, the optical-path deflecting prism group includes in order from an object side, three prisms namely, a first prism, a second prism, and a third prism, and the first prism, the second prism, and the third prism are disposed to be in mutual proximity, and the visual-field direction is let to be variable to a first direction by the first prism undergoing a rotational movement with respect to the second prism, and furthermore, the visual-field direction is let to be variable to a second direction which differs from the first direction, by the first prism and the second prism undergoing rotational movement integrally with respect to the third prism, wherein the endoscope objective optical system satisfies the following conditional expression (1)

0.9≦L/FL≦1.5  (1) where, L denotes a total air conversion length (unit mm) of the first prism, the second prism, and the third prism in the optical-path deflecting prism group, and here the total air conversion length is a value obtained by summing up a value obtained by dividing a length of an optical axis passing through the first prism by a refractive index for a d-line nd1 of a glass material of the first prism, a value obtained by dividing a length of an optical axis passing through the second prism by a refractive index for the d-line nd2 of a glass material of the second prism, and a value obtained by dividing a length of an optical axis passing through the third prism by a refractive index for the d-line nd3 of a glass material of the third prism, and FL denotes a focal length (unit mm) of the endoscope objective optical system.

Various embodiments comprise endoscopes (e.g., arthroscopes) for viewing inside a cavity of a body. The endoscopes may include a tip, at least one solid-state emitter such as light emitting diode (LED), located at the distal end of the endoscope, an elongated member. The elongated member may include a plurality of lenses for transmitting light received from the tip member and an elongated conducting member for providing electric power to the solid-state emitter. The elongated conducting member may include conducting lines embedded in a flexible elongated insulating membrane. The tip member and the elongated member may be configured to dissipate heat generated by the solid-state emitter.

There are provided an operation unit that allows a practitioner to easily ascertain a vertical direction of an observation image output from an image pickup unit and displayed on a monitor and an endoscope including the operation unit.

An operation unit is connected to a proximal end side of an insertion unit of an endoscope, and the insertion unit is provided with an optical system and an image pickup unit picking up an image of light passing through the optical system. The operation unit includes: a grip part that extends in a direction of an insertion axis of the insertion unit; a first flat surface portion that is formed on an outer surface of the grip part at a position on a top side in a vertical direction, extends in the direction of the insertion axis, and is perpendicular to the vertical direction in a case where a direction which indicates a top and a bottom of an image formed from image pickup signals output from the image pickup unit, among directions perpendicular to the direction of the insertion axis, is defined as the vertical direction; and a second flat surface portion that is formed on the outer surface of the grip part at a position on a bottom side in the vertical direction, extends in the direction of the insertion axis, and is perpendicular to the vertical direction.

An endoscope system includes an endoscope and a processor. The endoscope includes: an actuator including a coil configured to cause a movable lens and a magnet to move by application of a drive signal; a position sensor configured to output a position detection signal showing a position of the movable lens according to a magnetic flux of the magnet; and an endoscope memory storing correction information for correcting crosstalk onto the position detection signal by the magnetic flux of the coil. The processor includes a drive controller configured to correct the position detection signal based on the drive signal and the correction information and output the drive signal based on a target position and the corrected position detection signal, to the actuator.

An endoscope includes in a distal end portion of an insertion portion, an image pickup apparatus which includes an image pickup device including a semiconductor substrate in which an image pickup section is formed on a first principal surface, the semiconductor substrate including a bonding terminal on a second principal surface, and a wiring layer that is placed on the first principal surface of the semiconductor substrate and includes a conductor layer stacked via insulating layers, and a cover glass that is bonded in such a manner as to cover an entire side of the first principal surface of the image pickup device, the endoscope including a protection section that covers at least a side surface of the wiring layer of the image pickup device, the protection section including a resin in which blocking particles are dispersed, the blocking particles having lower moisture permeability than moisture permeability of the resin.

An endoscope magnification optical system including: a first lens group that has positive power and includes at least a negative lens with a concave surface facing an object side, a positive lens with a convex surface facing an image side, and a doublet obtained by bonding a negative lens and a positive lens; a second lens group that has negative power and includes at least a doublet obtained by bonding a negative lens and a positive lens; and a third lens group that has positive power and includes at least a positive lens and a doublet obtained by bonding a negative lens and a positive lens, is configured such that predetermined conditions are satisfied.

A lens having a quadrangular outer shape in a direction perpendicular to its center, an imaging element having a quadrangular outer shape in the direction perpendicular to the center axis, an element cover glass covering an imaging surface of the imaging element, a light guide placed outside at least one side of the lens and extending along the center axis, and a cylinder holder disposed between the lens and the light guide are disposed in a tip portion of an endoscope.

An endoscope realized as either a borescope or a fiberscope including one or more fluid filled lenses is described. In an embodiment, the optical power of the fluid filled lenses may be adjusted to adjust the focal length associated with the endoscope. Thus, variable working distances are allowable while maintaining focus on an object in front of the endoscope. The endoscope may include a distance sensor, which is used to determine a distance between the endoscope and a sample. A processor may compare the measured distance to the current optical power of the one or more sealed fluid filled lenses. The processor may transmit signals to one or more actuators coupled to one or more sealed fluid filed lenses to change the optical power of the one or more sealed fluid filled lenses based on the comparison.