What is claimed is:
1. A pattern reading apparatus for causing an illumination light beam, emitted from a minute-area light source, to be incident on an object surface having a pattern formed thereon as an object to be read, converging the light beam, having the information of the pattern, by an objective lens, causing the converging light beam to be incident on an imaging lens, forming the image of the pattern by the imaging lens and reading the image, wherein
the objective lens is positioned such that the light beam originating from a point of the object surface and emitted from the objective lens is a non-parallel light beam and wherein the imaging lens and an imaging surface are movable along an optical axis direction of the imaging lens to change magnification.
2. The pattern reading apparatus according to claim 1, wherein the distance x between the object surface and the objective lens satisfies the condition 0<x<0.7 fo where fo is the focal length of the objective lens.
3. The pattern reading apparatus according to claim 1, wherein the object surface is a reflection surface and the light source is positioned such that the light beam originating from the light source reaches the object source through the objective lens and reflects from the reflection surface to be incident on the imaging lens after the light beam passes through the objective lens again.
4. The pattern reading apparatus according to claim 3, wherein the light source and the imaging lens are positioned on opposite sides of an optical axis of the objective lens and the light source is positioned such that the light beam is perpendicularly incident on the object surface.
5. The pattern reading apparatus according to claim 1, further comprising a spatial filter having a shading region for shading paraxial rays, the filter being positioned in the optical path between the objective lens and the imaging lens.
6. The pattern reading apparatus according to claim 5, wherein said spatial filter is positioned nearer to said objective lens than a paraxial image point of the light source formed through the objective lens.
7. The pattern reading apparatus according to claim 3, wherein the light source is positioned farther from the objective lens than the front focal point of the objective lens.
8. The pattern reading apparatus according to claim 1, further comprising an illumination lens interposed between the light source and the object surface, and wherein the light source is positioned farther from the illumination lens than a front focal point of the illumination lens.
9. The pattern reading apparatus according to claim 1, further comprising an imaging element positioned at the imaging surface for reading the pattern.
10. A pattern reading apparatus, comprising:
a minute-area light source;
an objective lens that causes an illumination light beam from said light source to be incident on an object surface having a pattern formed thereon as an object to be read and converging a light beam reflected at the object surface;
a spatial filter that captures a scattered reflected component which is contained in the reflected light beam that passed through said objective lens; and
an imaging element positioned at the imaging position of the pattern image for reading the pattern,
wherein said imaging lens and said imaging element are movable along the optical axis direction of said imaging lens to change magnification.
11. The pattern reading apparatus according to claim 10, wherein the distance x between the object surface and the objective lens satisfies the condition 0<x<0.7 fo, where fo is the focal length of the objective lens.
12. The pattern reading apparatus according to claim 10, wherein said light source and said imaging lens are positioned on different sides of an optical axis of said objective lens and said light source is positioned such that the illumination light beam is obliquely incident on the object surface.
13. The pattern reading apparatus according to claim 10, wherein said spatial filter is positioned nearer to the objective lens than a paraxial image point of the light source formed through the objective lens.
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 door system for a building, said door system comprising:
an internal frame;
an interior sheath attached to said internal frame;
an exterior sheath attached to said internal frame; and
exterior trim attached on said exterior sheath.
2. The door system of claim 1 wherein said internal frame includes:
metallic components.
3. The door system of claim 1 wherein said internal frame includes:
wood components.
4. The door system of claim 1 wherein said internal frame includes:
plastic components.
5. The door system of claim 1 wherein said internal frame includes:
a solid wooden panel.
6. The door system of claim 1 wherein said internal frame includes:
a composite panel.
7. The door system of claim 1 wherein said internal frame includes:
a polystyrene panel.
8. The door system of claim 1 wherein said internal frame includes:
at least one vertical component and at least one horizontal component; and
an attachment mechanism for attaching said at least one vertical component and said at least one horizontal component to one another.
9. The door system of claim 8 wherein said attachment mechanism includes:
fastening mechanisms attaching said at least one vertical component and said at least horizontal component to at least one of said exterior sheath and said interior sheath.
10. The door system of claim 1 wherein the exterior edges of said exterior sheath extend beyond said internal frame.
11. The door system of claim 1 wherein the exterior edges of said exterior sheath, the exterior edges of said interior sheath and the exterior edges of the internal frame are flush with one another.
12. The door system of claim 1 wherein the exterior edges of said exterior sheath extend beyond said internal frame while the exterior edges of said interior sheath are the same dimensions of the exterior edges of said internal frame.
13. The door system of claim 1 wherein said door includes:
apertures in said exterior sheath, interior sheath and frame to accommodate hinges for fastening said door to a building.
14. The door system of claim 1 wherein said door includes:
apertures in said exterior sheath, interior sheath and internal frame to accommodate hardware and windows on said door system.
15. A door for a building, said door comprising:
an internal frame;
an interior sheath attached to said internal frame;
an exterior sheath attached to said internal frame; and
the exterior edges of said exterior sheath extending beyond the exterior edges of said internal frame.
16. The door of claim 15 wherein said internal frame includes:
structural metal components.
17. The door of claim 15 wherein said internal frame includes:
structural plastic components.
18. The door of claim 15 wherein said internal frame includes:
structural wood components.
19. The door of claim 15 wherein said internal frame includes:
structural polystyrene components
20. The door of claim 15 wherein said internal frame includes:
structural composite components
21. The door of claim 15 wherein said internal frame includes:
a fastening mechanism for fastening said internal frame to at least one of said exterior sheath and said interior sheath.
22. The door of claim 21 wherein said attachment mechanism includes:
fasteners securing said interior sheath to said internal frame.
23. The door of claim 21 wherein said attachment mechanism includes:
fasteners securing said exterior sheath to said internal frame.
24. A method for assembling a door for a building, said method including the steps of:
placing internal frame components on a surface;
securing an interior sheath to the internal frame components;
reversing the assembled internal frame components and interior sheath so the internal frame components are exposed; and
securing an exterior sheath to the internal frame components.
25. The method of claim 24 wherein said method further includes:
fastening trim components to the exterior sheath.
26. The method of claim 24 wherein said method further includes:
forming apertures for hinges, windows and other hardware on said door.