Abstract: A lens supporting structure includes a mounting structure, such as an integral part of a housing, that includes one or more fixing parts that mate with one or more fixing parts of a lens holder. The fixing parts may be posts with screw holes on the housing, as well as screws passing through elongated holes on lens holder flanges. The lens supporting structure further includes securing parts on the mounting structure and on the lens holder, which may be elongated projections on the housing and the lens holder, that engage to prevent movement of the lens holder in a first direction at the same time that engagement of fixing parts, such as posts and the flanges, prevent movement of the lens holder in a second direction perpendicular to the first direction so that the lens holder can be simultaneously accurately positioned in both directions and then fixed in position.

Abstract: A mirror support structure includes a mirror holder and a detachably attachable single unit which, when attached to the mirror holder after a mirror has been inserted in the mirror holder, applies bias forces to the mirror. The bias forces are applied so as to press against a front surface of the mirror in the vicinities of the two fixed points and the adjustable point, which tilts the mirror, so that the back surface of the mirror touches the two fixed points and the adjustable point. The single unit includes flexible parts, which apply bias forces to the front surface of the mirror in the vicinities of the two fixed points, and a flexible part which applies a bias force, that is less than the bias forces applied in the vicinities of the two fixed points, to the front surface of the mirror in the vicinity of the adjustable point.

Abstract: A light source apparatus comprises a light source and a collimating lens for adjusting a luminous flux from the light source. The light source is supported by a holder made of a steel plate, a supporting member made of a steel plate is supported by the holder so as to slide in a direction of an optical axis to the collimating lens, and the collimating lens is supported by the supporting member.

Abstract: An optical scanner comprises a light source, a reflection mirror, deflection device, and an f·&thgr; lens fixed to a plate-shaped bracket. The optical scanner is characterized in that a luminous flux emitted from the light source is guided to the deflection device by the reflection mirror and the luminous flux deflected by the deflection device is guided to the f·&thgr; lens, a light source optical path from the light source to the reflection mirror is arranged to be tilted with respect to a plane which is drawn by an optical axis of a scanning optical path led to the f·&thgr; lenses deflected by the deflection device, and the light source optical path is arranged on one side across the plane drawn by the optical axis of the scanning optical path, and the plate-shaped bracket of the f·&thgr; lens is arranged on the other side.

Abstract: A mounting mechanism is disclosed for a strap member in which the orientation of a surface of the strap member, such as a reflecting mirror, is adjustable. In particular, the strap member may be a cylindrical mirror for reflecting light beams to image carriers such as sensitized drums on which images are recorded in an optical reproductive scanning apparatus. The mounting mechanism allows the strap member to be readily fixed in position without causing positional changes of the strap member that would change the magnification and/or cause skew changes in scanning lines when the strap member is a cylindrical mirror in an optical scanning apparatus.

Abstract: A mirror support structure includes a mirror holder and a detachably attachable single unit which, when attached to the mirror holder after a mirror has been inserted in the mirror holder, applies bias forces to the mirror. The bias forces are applied so as to press against a front surface of the mirror in the vicinities of the two fixed points and the adjustable point, which tilts the mirror, so that the back surface of the mirror touches the two fixed points and the adjustable point. The single unit includes flexible parts, which apply bias forces to the front surface of the mirror in the vicinities of the two fixed points, and a flexible part which applies a bias force, that is less than the bias forces applied in the vicinities of the two fixed points, to the front surface of the mirror in the vicinity of the adjustable point.

Abstract: A lens supporting structure includes a mounting structure, such as an integral part of a housing, that includes one or more fixing parts that mate with one or more fixing parts of a lens holder. The fixing parts may be posts with screw holes on the housing, as well as screws passing through elongated holes on lens holder flanges. The lens supporting structure further includes securing parts on the mounting structure and on the lens holder, which may be elongated projections on the housing and the lens holder, that engage to prevent movement of the lens holder in a first direction at the same time that engagement of fixing parts, such as posts and the flanges, prevent movement of the lens holder in a second direction perpendicular to the first direction so that the lens holder can be simultaneously accurately positioned in both directions and then fixed in position.

Abstract: A mounting mechanism is disclosed for a strap member in which the orientation of a surface of the strap member, such as a reflecting mirror, is adjustable. In particular, the strap member may be a cylindrical mirror for reflecting light beams to image carriers such as sensitized drums on which images are recorded in an optical reproductive scanning apparatus. The mounting mechanism allows the strap member to be readily fixed in position without causing positional changes of the strap member that would change the magnification and/or cause skew changes in scanning lines when the strap member is a cylindrical mirror in an optical scanning apparatus.

Abstract: An optical scanner comprises a light source, a reflection mirror, deflection device, and an f·&thgr; lens fixed to a plate-shaped bracket. The optical scanner is characterized in that a luminous flux emitted from the light source is guided to the deflection device by the reflection mirror and the luminous flux deflected by the deflection device is guided to the f·&thgr; lens, a light source optical path from the light source to the reflection mirror is arranged to be tilted with respect to a plane which is drawn by an optical axis of a scanning optical path led to the f·&thgr; lenses deflected by the deflection device, and the light source optical path is arranged on one side across the plane drawn by the optical axis of the scanning optical path, and the plate-shaped bracket of the f·&thgr; lens is arranged on the other side.

Abstract: A light source apparatus comprises a light source and a collimating lens for adjusting a luminous flux from the light source. The light source is supported by a holder made of a steel plate, a supporting member made of a steel plate is supported by the holder so as to slide in a direction of an optical axis to the collimating lens, and the collimating lens is supported by the supporting member.

Abstract: An optical path adjusting device comprises a hollow cylindrical mount having a center axis in alignment with an optical path of a light beam and an optical parallel mounted on the hollow cylindrical barrel so as to intersect the optical path of the light beam at a specified angle of intersection. The hollow cylindrical barrel is supported so as to rotate about an original optical path of the light beam, thereby causing a displacement of an optical path of said light beam coming out of the optical parallel close to or away from the original optical path of the light beam.

Abstract: The optical recording medium includes at least a recording layer, a recording supplemental layer, a reflection layer and a protection layer on a light permeable substrate, each of the recording layer and the recording supplemental layer is made mainly of an organic pigment material, with the optical recording medium, recording and reproducing is possible using a laser beam having a wavelength of &lgr;1 and also recording and/or reproducing is possible using a laser beam having a wavelength of &lgr;2 which is shorter than &lgr;1, a spectral absorbance of the recording layer is in the range between 5% and 35% at a wavelength of &lgr;1 and not less than 15% at a wavelength of &lgr;2, and the recording supplemental layer has a peak of spectral reflectance at a wavelength in the vicinity of &lgr;2.

Abstract: A mechanism for adjustable installation of band plate-like members facilitates the separate adjustment of a cylindrical mirror in the normal direction of the reflecting face of the mirror, in a direction intersecting the normal direction, and the orientation of the reflecting face. A mirror holder housing a cylindrical mirror is disposed in a frame. Support shafts of the mirror holder penetrate holder plates attached slidably to the frame. Adjustment plates are linked to the ends of the support shafts from outside the holder plates, which are slid to allow the mirror holder to move in the normal direction of the reflecting surface of the mirror. The adjustment plate is rotated with respect to the holder plate to rotate about the support shafts and slides with respect to the holder plate and moves in a direction different from the normal direction to adjust the magnification, register, and skew of the mirror.

Abstract: A light source unit having optical elements which include a laser source, a collimator lens, a cylindrical lens and an optical path adjusting optical parallel mounted in fixed positions on a metal mount is adjusted to provide given optical characteristics and secured to a plastic housing of an optical scanning device. After optical scanning device is installed to an image forming machine so as to direct a scanning beam from the laser source toward an image carrier which is scanned by the scanning beam.

Abstract: Novel glucosaminyl muramyl peptide derivatives of the formula: ##STR1## wherein X is hydrogen atom or a group of the formula: R.sub.1 CO--, Y is hydroxy group or a group of the formula: --OR.sub.2, ##STR2## R.sub.1 is an alkyl or alkenyl group, R.sub.2 is a lower alkyl group or a phenylalkyl group, R.sub.3 and R.sub.4 are the same or different and are each hydrogen atom or an alkyl group, Y' is hydroxy group or a group of the formula: --OR.sub.2 or ##STR3## (D) and (L) mean the configuration, provided that when X is hydrogen atom, Y is a group of the formula: ##STR4## and their pharmaceutically acceptable salts. They have excellent biological activities such as potentiating activity of nonspecific resistance to microbial infections and immunostimulant activity and hence are useful in the prophylaxis and treatment of various microbial infections.

Abstract: Process for the production of a disaccharide-tripeptide and disaccharide-tetrapeptide which comprises applying an endo-N-acetylmuramidase from Streptomyces globisporus and a D-alanyl-meso-2,6-diaminopimelic acid endopeptidase from Streptomyces nitrosporeus SK (FERM BP-216) or Streptomyces globisporus to hydrolyze cell walls of bacteria such as Lactobacillus plantarum and Corynebacterium diphtheriae. Said process can give the desired disaccharide-tripeptide and disaccharide-tetrapeptide having excellent pharmacological activities such as immunostimulant activity and potentiating activity of nonspecific resistance to bacterial infections in the form of a single compound (i.e. not mixture thereof) in a high yield.

Abstract: Novel alkaline protease M.sub.3 which is distinguished from known alkaline proteases in the phisiochemical properties, particularly in terms of the strong alkaline optimum pH: 9-12.5; being not inhibited by FeSO.sub.4, diisopropyl fluorophosphate, ethylenediamine tetraacetate and iodoacetic acid; having glucosyltransferase inhibitory activity; and having the lowest molecular weight, and which can be produced by cultivating a microorganism of the genus Streptomyces, particularly Streptomyces globisporus B-1829 strain (ATCC 21553). The alkaline protease M.sub.3 is useful for prevention of dental caries.

Abstract: This invention relates to 1,8-naphthyridine compounds of the formula ##STR1## wherein X is a halogen atom especially fluorine atom,R.sub.1 is an ethyl group or a vinyl group, andR.sub.2 is a hydrogen atom or a lower alkyl group, their salts and processes for the preparation of them.The 1,8-naphthyridine compounds and their salts are useful as antibacterial agents and intermediates thereof.

Abstract: This invention relates to 1,8-naphthyridine compounds of the formula ##STR1## wherein X is a halogen atom especially fluorine atom,R.sub.1 is an ethyl group or a vinyl group, andR.sub.2 is a hydrogen atom or a lower alkyl group, their salts and processes for the preparation of them.The 1,8-naphthyridine compounds and their salts are useful as antibacterial agents and intermediates thereof.

Abstract: The present invention provides a 1,8-naphthyridine compound of the formula ##STR1## wherein R is hydrogen, methyl, ethyl or propyl, and a nontoxic pharmaceutically acceptable salt thereof, and a process for preparing a 1,8-naphthyridine compound of the above formula which comprises(A) reacting a compound of the formula ##STR2## wherein Y is halogen, lower alkoxy, lower alkylthio, lower alkylsulfinyl, lower alkylsulfonyl, lower alkylsulfonyloxy or arylsulfonyloxy, and R.sub.1 is hydrogen or lower alkyl,with a compound of the formula ##STR3## wherein R.sub.2 is hydrogen or a protective group for the amino group, and R is as defined above,and when a reaction product in which R.sub.1 is lower alkyl and/or R.sub.2 is the amino protective group is obtained, treating it with an acid or base, and/or reductively cleaving it,(B) decomposing a compound of the formula ##STR4## wherein A .crclbar. is a fluorine-containing anion, and R.sub.1 and R.sub.2 are as defined above,and when a reaction product in which R.sub.