Abstract: In the method for producing holograms, a plurality of images displayed on a spatial optical modulating element 6 is used as the object light. Through a lens array 7 composed of a plurality of lenses disposed corresponding to each of the images, which are included in the object light, and a reducing optical system 9 and 10 for reducing the object light emitted from the lens array 7, the object light is made to irradiate a recording surface 11 along with a reference light; thereby interference light between the object light and the reference light is recorded on the recording surface 11. Between the spatial optical modulating element 6 and the lens array 7, partitions 15 for separating the respective images are provided; thereby noise is reduced.

Abstract: The distance between a spatial light modulating device 7 and a lens 8 is set such that a real or virtual image position 9, 9? (L, L?) of object light formed by the lens 8 is an observing position of a hologram 12?. Since a reconstructed image is fixed at the observing position L, L?, noise existing in the reconstructed image of the spatial light modulating device 7? if any is fixed at the observing position and thus is unremarkable as noise, whereby the noise is substantially lowered.

Abstract: In the method for producing holograms, a plurality of images displayed on a spatial optical modulating element 6 is used as the object light. Through a lens array 7 composed of a plurality of lenses disposed corresponding to each of the images, which are included in the object light, and a reducing optical system 9 and 10 for reducing the object light emitted from the lens array 7, the object light is made to irradiate a recording surface 11 along with a reference light; thereby interference light between the object light and the reference light is recorded on the recording surface 11. Between the spatial optical modulating element 6 and the lens array 7, partitions 15 for separating the respective images are provided; thereby noise is reduced.

Abstract: The distance between a spatial light modulating device 7 and a lens 8 is set such that a real or virtual image position 9, 9′ (L, L′) of object light formed by the lens 8 is an observing position of a hologram 12′. Since a reconstructed image is fixed at the observing position L, L′, noise existing in the reconstructed image of the spatial light modulating device 7′ if any is fixed at the observing position and thus is unremarkable as noise, whereby the noise is substantially lowered.

Abstract: When a master hologram is to be formed in this method, a diffusing screen image is output as object light onto a first recording surface 12 via a lens 8′. When a slave hologram is to be formed, a second recording surface 12″ is placed in a position where an image of the object light is formed by the lens 8′. In this method, the distance between a diffusing screen 7′ and the first recording surface 12 when a master hologram 12′ is recorded can be made different from the distance between the master hologram 12′ and the second recording surface 12″ when a slave hologram 12″ is recorded. By varying these distances as needed, a hologram can be formed using a small optical system.

Abstract: The present invention provides a substituted benzoylurea derivative having the formula (I), ##STR1## (wherein Q is a --R.sub.1 N(Z.sub.2)Z.sub.3 group or a --R.sub.2 N(Z.sub.4)COR.sub.1 N(Z.sub.2)Z.sub.3 group, R.sub.1 and R.sub.2 are respectively an alkanediyl group which may be substituted with a lower alkylthio group or a phenyl group, Z.sub.1, Z.sub.2, Z.sub.3 and Z.sub.4 are respectively a hydrogen atom or a lower alkyl group, R.sub.1 and Z.sub.2 may be bonded with each other to form a heterocyclic ring with an adjacent nitrogen atom, X is a halogen atom, a lower alkyl group or a CF.sub.3 group, and Y is a halogen atom) or its salt, effective as an antitumor agent; a method for producing the same; an antitumor composition containing the same; and an intermediate product for producing the same.

Abstract: An immuno-suppressive agent containing, as an effective component, an, enopyranose derivative of the following formula (I) or its salt: ##STR1## wherein R.sup.1 is a hydrogen atom, alkyl which may be substituted, alkenyl, alkynyl, --OSO.sub.2 R.sup.7, a halogen atom, --OCOR.sup.7, --NHCOR.sup.8, alkoxy, phenyl which may be substituted or a saccharose residue, R.sup.2 is a hydrogen atom or alkyl, R.sup.3 is a hydrogen atom or a halogen atom, R.sup.4 is a hydrogen atom, --COR.sup.9, silyl which may be substituted or alkyl which may be substituted, one of R.sup.5 and R.sup.6 is hydroxyl, alkoxy which may be substituted, a saccharose residue, cycloalkyloxy which may be substituted or --OCOR.sup.10 and the other is a hydrogen atom or alkyl which may be substituted, or R.sup.4 and R.sup.5 together form a single bond, while R.sup.6 is a hydrogen atom or alkyl which may be substituted, each of R.sup.7, R.sup.9 and R.sup.10 is alkyl or phenyl which may be substituted, R.sup.

Abstract: Exo-3',4'-O-benzylidene-3"-dimethylchartreusin (exo-BDMC) or its salts and 3"-demethylchartreusin (3"-DMC) or its salts are provided according to the present invention. Exo-BDMC and its salts are useful for antitumorous agents and antibacterial agents. 3"-DMC and its salts are useful as starting materials for producing exo-BDMC.

Abstract: This invention relates to a novel chartreusin derivative of the general formula (I): ##STR1## and a salt thereof. This chartreusin derivative and a salt thereof have an excellent antitumor activity, which is exhibited even when the site of cancer inoculation and the site of drug administration are different. This invention further relates to an antitumorous composition containing the above-mentioned compound as active ingredient. This invention furthermore relates to a process for producing the above-mentioned chartreusin derivative or salt thereof.

Abstract: This invention relates to a novel chartreusin derivative of the general formula (I): ##STR1## and a salt thereof. This chartreusin derivative and a salt thereof have an excellent antitumor activity, which is exhibited even when the site of cancer inoculation and the site of drug administration are different. This invention further relates to a antitumorous composition containing the above-mentioned compound as active ingredient. This invention furthermore relates to a process for producing the above-mentioned chartreusin derivative or salt thereof.

Abstract: This invention relates to a novel chartreusin derivative of the general formula (I): ##STR1## and a salt thereof. This chartreusin derivative and a salt thereof have an excellent antitumor activity, which is exhibited even when the site of cancer inoculation and the site of drug administration are different. This invention further relates to a antitumorous composition containing the above-mentioned compound as active ingredient. This invention furthermore relates to a process for producing the above-mentioned chartreusin derivative or salt thereof.