摘要:
An endoscope includes an insertion portion including an image pickup section, an illumination section, and a light guide inserted inside the insertion portion, the light guide including a plurality of fibers made of a glass not containing lead, the plurality of fibers guiding illuminating light from a light source apparatus to the illumination section, the light guide having a numerical aperture of 0.46 to 0.90. A core glass of a fiber have a refractive index nd of 1.56 to 1.74, and a composition of (A) 20 to 55 wt % SiO2, (B1) 0 to 4.0 wt % B2O3, (B2) neither P2O5 nor GeO2 contained, (C) 25 to 72 wt % (BaO+SrO+La2O3+Lu2O3+Ta2O5+Gd2O3+WO3), (D) 0 to 30 wt % ZnO, (E) no Al2O3 contained, (F) no ZrO2 contained, (G) neither PbO nor As2O3 contained, (H) 0 to 15 wt % (Na2O+K2O), (I) 0 to 0.050 wt % Sb2O3 and (J) 0.26 to 1.63 wt % (Na2SO4+K2SO4).
摘要:
A sheet feeding apparatus includes a manual feed tray on which sheets are stacked, a feeding member, side regulating plates, a detecting portion which detects positions of the side regulating plates and detects a width size of the sheets, an operation panel which receives an input of width size information of the sheets from a user, and a control circuit which compares width size information detected by the detecting portion and the width size information input to the operation panel, and stops a sheet feeding operation of the feeding member when the two pieces of width size information are different, and the control circuit compares the width size information of the detecting portion and the width size information of the operation panel, per sheet before the feeding member starts feeding the sheet.
摘要:
A sheet is fed to a registration roller pair by a separation-feeding unit formed by a sheet feeding roller and a separation portion, and is caused to abut a nip portion of the registration roller pair at rest to form a loop in the sheet. Then, when the registration roller pair rotates at a predetermined timing to convey the sheet, a pressurization plate is raised again to bring the sheet into press contact with the sheet feeding roller to thereby impart a conveyance force to the sheet, making it possible to feed the sheet reliably to the registration roller pair.
摘要:
In a NAT type determination method pursuant to RFC 3489, address information added in a binding response from a STUN server in response to a binding request issued in a latest transmission test is compared with address information added in a binding response in response to any transmission test executed therebefore. When the address information are not identical, a NAT type is determined symmetric. Even when a router whose NAT type changes frequently according to a use status is connected, communication is capable without manual setting change by a user.
摘要:
A sheet feeding apparatus is provided with a sheet stacking device for stacking sheets thereon, a sheet feeding device for feeding the sheets stacked on the sheet stacking device, and a heating device for heating the sheets stacked on the sheet stacking device. The heating device is designed such that of the heat generating areas of the heating device, the heating value of the heat generating area for the central portion of the sheets stacked on the sheet stacking device is greater than the heating values of the other heat generating areas.
摘要:
An endoscope system consists mainly of: an endoscope having a solid-state imaging device and an objective optical system that converges an object image on said solid-state imaging device; and a signal processing unit that processes an image signal produced by the endoscope so as to produce a video signal. The objective optical system includes an optical phase modulation member. The optical phase modulation member exhibits a response of 0.2 or more derived from an optical transfer function relative to a spatial frequency on the solid-state imaging device determined based on the Nyquist theorem, that is, a Nyquist frequency, over a wider range of distances than a depth of field offered by an objective optical system not having the optical phase modulation member.
摘要:
To provide a sheet conveying apparatus capable of enhancing an accuracy of correcting a skew of a sheet, and of preventing position shift of a sheet. The present invention provides a sheet conveying apparatus for conveying a sheet by a sheet conveying unit disposed along a sheet conveying path, including: a skew detection sensor for detecting a skew of the sheet with respect to a sheet conveying direction by a plurality of detection sensors disposed in a direction intersecting perpendicularly the sheet conveying direction; and a skew correction roller adapted to be pivotally moved in a direction of correction of a skew of the sheet in a state with the skewed sheet being held on the basis of a detection signal from the skew detection sensor, in which one of the plurality of detection sensors of the skew detection sensor is disposed nearly on an extension line from a pivotal movement center of the skew correction roller in the sheet conveying direction.
摘要:
A spatial frequency converting device in which the amount of conversion of spatial frequency characteristics is variable. An optical system using the spatial frequency converting device is a variable-focus optical system in which the depth of field can be enlarged by fixed signal processing. A pupil modulation element provided in a fixed-focus optical system includes a plurality of elements. At least one of the elements is rotated about an optical axis. In the variable-focus optical system, a movable lens placed on the object side of a pupil modulation element is moved along an optical axis.
摘要:
Using a transmittance adjusting device decreasing a transmittance of at least from 460 nm to 500 nm, which is a wavelength range between a point of end of a first optical absorption peak of hemoglobin and a point of start of a second optical absorption peak of hemoglobin, to between 20% and 70% for illuminating light from an illuminating light supply section or reflected light from an object, during observation of the inside of a body cavity, enhanced display of vessels with color reproduction that has no difference from that in observation under visible light, enabling color reproduction similar to that in observation under visible light and further enhanced display of vessels.
摘要:
An illumination device and an observation system capable of outputting light having a continuous spectrum and high color rendering properties are provided. Employed is an illumination device including a first light source that emits first-wavelength-band light having a first wavelength band of violet color; a second light source that emits second-wavelength-band light having a second wavelength band that is broader than the first wavelength band and having a continuous spectrum; a light combining section that is composed of a dicroic mirror and that combines the first-wavelength-band light and the second-wavelength-band light; and a combination-ratio adjusting section that adjusts the combination ratio of the first-wavelength-band light and the second-wavelength-band light to be combined by the light combining section.