Abstract: A microscope device connected to a network includes a communication unit and a control unit. The communication unit receives master setting information from a data processor by communicating with the data processor over the network, and the master setting information includes multiple pieces of customizing setting information that correspond to multiple types of microscopy. The control unit registers or updates own-device-setting information of the microscope device in accordance with the master setting information received by the communication unit.

Abstract: A microscope device connected to a network includes a communication unit and a control unit. The communication unit receives master setting information from a data processor by communicating with the data processor over the network, and the master setting information includes multiple pieces of customizing setting information that correspond to multiple types of microscopy. The control unit registers or updates own-device-setting information of the microscope device in accordance with the master setting information received by the communication unit.

Abstract: There is provided a bar code reader arranging a diaphragm member in which a through hole for an emission diaphragm and a through hole for a field diaphragm are formed as one body on an optical path between a laser light source and a scanning unit, in such a way that the both holes extend over an emission optical path along which emitted laser light is emitted, and a return optical path along which return light reflected from a bar code returns.

Abstract: An optical receiving device for receiving an optical signal (60) from a signal collector (50) comprising a detector (40) for receiving the optical signal (60) form the collector (50) and a signal mask (45) having an aperture (47) through which at least a portion of the signal (65) passes, said mask (45) located along an optical axis (66) of the signal intermediate the collector (50) and the detector (40) wherein the location of the signal mask (45) is such so as the attenuate the signal (65) to less than a saturation threshold of the detector (40) and a conjugate image plane (70a) of the signal (65) is located within a range form coincident with the mask (45) to intermediate the mask (45) and detector (40).

Abstract: The present invention provides an optical apparatus comprising an optical gain correction filter having a multilayer film structure formed by stacking a plurality of thin films with different diffractive indexes on a light transmitting board, wherein when the light with the wavelength ? enters at the incident angle ?, the transmissivity is assumed to be T1 (?, ?) (0?T1 (?, ?)?1), and the thickness and stacking state of each thin film of the optical gain correction filter are adjusted to increase the transmissivity T1 (?0, ?) when the incident angle ? increases close to the predetermined maximum incident angle ?max with respect to the incident light with the wavelength ?0. The optical apparatus is applied to a bar code reader.

Abstract: The present invention provides an optical apparatus comprising an optical gain correction filter having a multilayer film structure formed by stacking a plurality of thin films with different diffractive indexes on a light transmitting board, wherein when the light with the wavelength &lgr; enters at the incident angle &thgr;, the transmissivity is assumed to be T1(&lgr;, &thgr;)(0≦T1(&lgr;, &thgr;)≦1), and the thickness and stacking state of each thin film of the optical gain correction filter are adjusted to increase the transmissivity T1 (&lgr;0, &thgr;) when the incident angle &thgr; increases close to the predetermined maximum incident angle &thgr;max with respect to the incident light with the wavelength &lgr;0. The optical apparatus is applied to a bar code reader.