1. A hologram recording device for irradiating a recording beam to a hologram recording medium, and irradiating a reference beam to an illuminated region of the recording beam by variably controlling an incident angle of the reference beam on the hologram recording medium, whereby a hologram is recorded on the illuminated region in multiple through interference between the recording beam and the reference beam, the device comprising:
at least one variable reflector directing the reference beam to the illuminated region by reflection and being swung around a predetermined axis for changing the incident angle of the reference beam; and
a light shield being swung integrally with the variable reflector for partially shielding the reference beam so that a luminous flux diameter of the reference beam becomes narrower as the incident angle becomes larger.
2. The hologram recording device according to claim 1, wherein the reference beam is made incident on the variable reflector in a fixed direction and with a fixed luminous flux diameter, and is irradiated to the illuminated region through the light shield after being reflected by the variable reflector.
3. The hologram recording device according to claim 1, further comprising a fixed reflector for reflecting the reference beam from the variable reflector at a fixed reflecting surface, wherein the reference beam is made incident on the variable reflector in a fixed direction and with a fixed luminous flux diameter, and is irradiated to the illuminated region through the light shield after being reflected by the variable reflector and being again reflected by the fixed reflector.
4. The hologram recording device according to claim 1, wherein the variable reflector includes a first and a second variable reflector, the device further comprising a fixed reflector reflecting the reference beam at a reflecting surface fixed between the first and the second variable reflector, wherein the reference beam is made incident on the first variable reflector in a fixed direction and with a fixed luminous flux diameter, is led to the fixed reflector through the light shield right before and right after being reflected by the first variable reflector, and is irradiated to the illuminated region after being reflected by the fixed reflector and then by the second variable reflector.
5. A hologram recording method comprising the steps of: irradiating a recording beam to a hologram recording medium; and irradiating a reference beam to an illuminated region with the recording beam while variably controlling an incident angle of the reference beam on the hologram recording medium, whereby holograms is recorded on the illuminated region in multiple through interference between the recording beam and the reference beam;
wherein the step of irradiating the reference beam to the illuminated region while variably controlling an incident angle of the reference beam includes partially shielding the reference beam so that the luminance flux diameter of the reference beam becomes smaller as the incident angle of the reference beam becomes larger.
The claims below are in addition to those above.
All refrences to claim(s) which appear below refer to the numbering after this setence.
1. A curable composition having a first part and a second part, the curable composition comprising:
a) an epoxy resin, wherein the epoxy resin is in the first part of the curable composition;
b) a curing agent having at least two groups of formula \u2014NR1H where R1 is selected from hydrogen, alkyl, aryl, or alkylaryl, wherein the curing agent is in the second part of the curable composition;
c) a toughening agent, wherein the toughening agent is in the first part, in the second part, or in both the first part and the second part of the curable composition and wherein the toughening agent is a core-shell polymer, a butadiene-nitrile rubber, acrylic polymer or copolymer, an adduct of an amino-terminated material and an epoxy resin, or an adduct of a carboxy-terminated material and an epoxy resin; and
d) a reactive liquid modifier that is in the first part of the curable composition, the reactive liquid modifier comprising an acetoacetate ester of a polyol that is a vegetable oil, that is prepared from a vegetable oil, or that is a mixture thereof, wherein the polyol comprises a triglyceride having at least two hydroxyl groups and wherein the acetoacetate ester has at least two acetoacetoxy groups.
2. The curable composition of claim 1, wherein the polyol is of Formula (VIII)
wherein
each R9 is an aliphatic group having at least 8 carbon atoms and that is saturated or unsaturated;
at least two of the R9 groups have at least one hydroxyl group, and
each R9 group is optionally substituted with at least one alkoxy group.
3. The curable composition of claim 1, wherein the curable composition comprises 20 to 90 weight percent epoxy resin, 3 to 30 weight percent curing agent, 3 to 20 weight percent reactive liquid modifier, and 5 to 55 weight percent toughening agent based on a total weight of the curable composition.
4. The curable composition of claim 1, wherein the curable composition is free or substantially free of an oil displacing compound, of an oil adsorbing filler, or both.
5. The curable composition of claim 1, wherein the curable composition further comprises 0.1 to 25 weight percent oil displacing agent based on a total weight of the curable composition.
6. The curable composition of claim 1, wherein the curable composition further comprises 0.1 to 8 weight percent of an oil adsorbing filler.
7. A cured composition comprising a reaction product of a curable composition comprising:
a) an epoxy resin;
b) a curing agent having at least two groups of formula \u2014NR1H where R1 is selected from hydrogen, alkyl, aryl, or alkylaryl;
c) a toughening agent that is a core-shell polymer, a butadiene-nitrile rubber, acrylic polymer or copolymer, an adduct of an amino-terminated material and an epoxy resin, or an adduct of a carboxy-terminated material and an epoxy resin; and
d) a reactive liquid modifier that is in the first part of the curable composition, the reactive liquid modifier comprising an acetoacetate ester of a polyol that is a vegetable oil, that is prepared from a vegetable oil, or that is a mixture thereof, wherein the polyol comprises a triglyceride having at least two hydroxyl groups and wherein the acetoacetate ester has at least two acetoacetoxy groups.
8. The cured composition of claim 7, wherein the polyol is of Formula (VIII)
wherein
each R9 is an aliphatic group having at least 8 carbon atoms and that is saturated or unsaturated;
at least two of the R9 groups have at least one hydroxyl group, and
each R9 group is optionally substituted with at least one alkoxy group.
9. The cured composition of claim 7, wherein the cured composition is an adhesive.
10. The cured composition of claim 7, wherein the cured composition is a polymeric coating.
11. The cured composition of claim 7, wherein the curable composition is free or substantially free of an oil displacing compound, of an oil adsorbing filler, or both.
12. An article comprising a first substrate and a cured composition positioned adjacent to the first substrate, the cured composition comprising a reaction product of a curable composition comprising:
a) an epoxy resin;
b) a curing agent having at least two groups of formula \u2014NR1H where R1 is selected from hydrogen, alkyl, aryl, or alkylaryl;
c) a toughening agent that is a core-shell polymer, a butadiene-nitrile rubber, acrylic polymer or copolymer, an adduct of an amino-terminated material and an epoxy resin, or an adduct of a carboxy-terminated material and an epoxy resin; and
d) a reactive liquid modifier that is in the first part of the curable composition, the reactive liquid modifier comprising an acetoacetate ester of a polyol that is a vegetable oil, that is prepared from a vegetable oil, or that is a mixture thereof, wherein the polyol comprises a triglyceride having at least two hydroxyl groups and wherein the acetoacetate ester has at least two acetoacetoxy groups.
13. The article of claim 12, wherein the polyol is of Formula (VIII)
wherein
each R9 is an aliphatic group having at least 8 carbon atoms and that is saturated or unsaturated;
at least two of the R9 groups have at least one hydroxyl group, and
each R9 group is optionally substituted with at least one alkoxy group.