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A modular laser level determination system includes a laser beam generator in a housing, fixed to a positioner. The laser beam is oriented towards a central shaft inside the housing that is not closed off by any obstacles and passes through a collimator. A rotation drive module of an optical assembl

A modular laser level determination system includes a laser beam generator in a housing, fixed to a positioner. The laser beam is oriented towards a central shaft inside the housing that is not closed off by any obstacles and passes through a collimator. A rotation drive module of an optical assembly comprises at least one reflection plane. The rotation drive module extends in a direction coaxial with the center line of the laser beam. The rotation drive module comprises a brushless motor with electronic switching, a hollow shaft, and a stator fixed to an element fixed in rotation. The stator can be tilted by a module for determination and adjustment of the inclination with respect to a reference place. The laser beam generator is fixed to the brushless motor.

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A modular laser level determination system includes a laser beam generator in a housing, fixed to a positioner. The laser beam is oriented towards a central shaft inside the housing that is not closed off by any obstacles and passes through a collimator. A rotation drive module of an optical assembl

A modular laser level determination system includes a laser beam generator in a housing, fixed to a positioner. The laser beam is oriented towards a central shaft inside the housing that is not closed off by any obstacles and passes through a collimator. A rotation drive module of an optical assembly comprises at least one reflection plane. The rotation drive module extends in a direction coaxial with the center line of the laser beam. The rotation drive module comprises a brushless motor with electronic switching, a hollow shaft, and a stator fixed to an element fixed in rotation. The stator can be tilted by a module for determination and adjustment of the inclination with respect to a reference place. The laser beam generator is fixed to the brushless motor. contacting, said transfer surface, wherein said stamper comprises a metallic layer on a side of said heat insulating material opposite to a side facing said transfer surface; and separating said pair of mold parts to thereby remove said resin cooled off. 2. A method as recited in claim 1, wherein the optical disk base is formed with at least one of a spiral groove and concentric grooves. 3. A method of producing an optical disk, comprising: injecting molten resin into a cavity formed by a pair of mold parts and accommodating a stamper having a transfer surface for molding the optical disk base and a heat insulating layer extending in parallel to, but not contacting, said transfer surface, wherein said stamper comprises a metallic layer on a side of said heat insulating material opposite to a side facing said transfer surface; separating said pair of mold parts to thereby remove said resin cooled off; coating a transfer surface of said resin with a recording material to thereby form a light absorption layer; forming a reflection film on said light absorption film; and forming a protection film on said reflection film. 4. A method as recited in claim 3, wherein the optical disk base is formed with at least one of a spiral groove and concentric grooves. 5. An optical disk base produced by a method comprising: injecting molten resin into a cavity formed by a pair of mold parts and accommodating a stamper having a transfer surface for molding the optical disk base and a heat insulating layer extending in parallel to, but not contacting, said transfer surface, wherein said stamper comprises a metallic layer on a side of said heat insulating material opposite to a side facing said transfer surface; and separating said pair of mold parts to thereby remove said resin cooled off. 6. An optical disk base as recited in claim 5, wherein the optical disk base is formed with at least one of a spiral groove and concentric grooves. 7. An optical disk produced by a method comprising: injecting molten resin into a cavity formed by a pair of mold parts and accommodating a stamper having a transfer surface for molding the optical disk base and a heat insulating layer extending in parallel to, but not contacting, said transfer surface, wherein said stamper comprises a metallic layer on a side of said heat insulating material opposite to a side facing said transfer surface; separating said pair of mold parts to thereby remove said resin cooled off; coating a transfer surface of said resin with a recording material to thereby form a light absorption layer; forming a reflection film on said light absorption film; and forming a protection film on said reflection film. 8. An optical disk as recited in claim 7, wherein the optical disk base is formed with at least one of a spiral groove and concentric grooves. 9. A method of producing an optical disk base, comprising positioning a heat insulating material beneath a recording area formed on a surface of a stamper for molding an optical disk, wherein said stamper comprises a metallic layer on a side of said heat insulating material. 10. A method as recited in claim 9, wherein the optical disk base is formed with at least one of a spiral groove and concentric grooves. 11. A method of producing an optical disk base, comprising positioning a heat insulating material beneath a recording area formed on a surface of a stamper for molding an optical disk, wherein said heat insulating material is absent around an outer edge and an inner edge of said stamper. 12. A method as claimed in claim 11, wherein said heat insulating material has a thermal conductivity lower than 94 W/m.k. 13. A method as claimed in claim 11, wherein said heat insulating material comprises a heat resistant organic polymer. 14. A method as claimed in claim 13, wherein the heat resistant organic polymer comprises at least one of polyimide and polyamideimide. 15. A method as claimed in claim 14, wherein at least one o