1. An optical device comprising:
an optical system mount plate on which an optical system is mounted;
a casing in which said optical system mount plate is housed; and
a screw-hole forming part that is provided on a bottom of said casing so that a screw provided on a tripod head can threadingly fit in a screw hole provided in said screw-hole forming part;
said screw-hole forming part and at least one portion of said bottom being engaged with said optical system mount plate so as to counteract a rotational tightening force that is affected on said screw-hole forming part when said screw is threadingly tightened in said screw-hole forming part.
2. A device according to claim 1, wherein said screw-hole forming part is provided with a first pin, and said bottom is provided with a second pin positioned so as to be separate from said first pin by a predetermined distance, tip portions of said first and second pins being engaged with said optical system mount plate.
3. A device according to claim 2, wherein said casing is made of a reinforced plastic material, and said screw-hole forming part, said first and second pins, and said casing are integrally formed.
4. A device according to claim 2, wherein said first and second pins are provided with protrusions at the tip portions thereof, and said protrusions are fit in holes formed in said optical system mount plate, so that said first and second pins are engaged with said optical system mount plate.
5. A device according to claim 1, wherein the center of the protrusion of said first pin is aligned with the center of said screw-hole forming part.
6. A device according to claim 1, further comprising a pair of telescopic optical systems mounted on said optical system mount plate, so that said optical device can serve as a binocular telescope.
7. A device according to claim 6, wherein said casing comprises a main casing section and a movable casing section engaged with said main casing section so as to be movable to expand and contract relative to said main casing section, said optical system mount plate comprises a first plate fixed on a side of said main casing section and a second plate fixed on a side of said movable casing section, one of said pair of telescopic optical systems is mounted on said first plate, the other of said pair of telescopic optical systems is mounted on said second plate, said movable casing section is moved relative to said main casing section so that the distance between the optical axes of said pair of telescopic optical systems is adjusted, and said screw-hole forming part is provided in said main casing section.
8. A device according to claim 7, wherein said movable casing section is linearly moved relative to said main casing section in such a manner that the optical axes of said pair of telescopic optical systems are moved in a predetermined plane, so that the distance between the optical axes of said pair of telescopic optical systems is adjusted.
9. A device according to claim 7, wherein each of said telescopic optical systems comprises a first optical system part fixed at a predetermined position on one of said first and second plates, and a second optical system part movable along the optical axis of said telescopic optical system relative to said first optical system part, so that each of said telescopic optical systems is provided with a focusing function.
10. A device according to claim 9, wherein said main casing section is provided with a focusing mechanism for moving said second optical system part relative to said first optical system part, and a rotary wheel for manually operating said focusing mechanism to perform said focusing function.
11. A device according to claim 10, wherein said rotary wheel has an annular projection formed on an outer surface of a rotary wheel cylinder, and said focusing mechanism forms a movement-conversion mechanism that converts a rotational movement of said rotary wheel into a linear movement of said second optical system part relative to said first optical system part.
12. A device according to claim 11, further comprising a photographing optical system provided in said rotary wheel.
13. A device according to claim 12, further comprising a lens barrel, which houses said photographing optical system, and which is provided in said rotary wheel cylinder and is movable along the optical axis of said photographing optical system to perform said focusing function, and where said focusing mechanism is provided between said rotary wheel cylinder and said lens barrel.
14. A device according to claim 1, further comprising a photographing optical system, said screw-hole forming part being disposed in such a manner that the central axis of the hole of said screw-hole forming part is perpendicular to the optical axis of said photographing optical system.
15. A device according to claim 2, further comprising a photographing optical system, said first and second pins being arranged parallel to the optical axis of said photographing optical system.
16. A device according to claim 1, wherein said optical system mount plate is made of material having a higher strength than that of said screw-hole forming part.
17. A device according to claim 16, wherein said optical system mount plate is made of a metal.
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 table assembly, comprising:
a table;
a vibration isolator coupled to said table; and,
a snubber attached to said table and said vibration isolator, wherein said snubber includes an elastomer mounted to said table, and a roller that is attached to said vibration isolator and coupled to said elastomer.
2. The assembly of claim 1, wherein said elastomer has a conical shape.
3. The assembly of claim 1, wherein said snubber includes a lower plate connected to said roller, said plate having an adjustable slot.
4. The assembly of claim 3, wherein said snubber includes an upper plate that has an alignment pin that is inserted into an alignment hole of said lower plate.
5. The assembly of claim 1, wherein said snubber includes an adjustment fastener coupled to said elastomer.
6. A table assembly, comprising:
a table;
a vibration isolator coupled to said table; and,
snubber means for limiting a movement of said table relative to said vibration isolator, said snubber means includes an elastomer mounted to said table, and a roller that is attached to said vibration isolator and coupled to said elastomer.
7. The assembly of claim 6, wherein said elastomer has a conical shape.
8. The assembly of claim 6, wherein said snubber means includes a lower plate connected to said roller, said plate having an adjustable slot.
9. The assembly of claim 8, wherein said snubber means includes an upper plate that has an alignment pin that is inserted into an alignment hole of said lower plate.
10. The elastomer of claim 6, wherein said snubber means includes an adjustment fastener coupled to said elastomer.
11. A snubber assembly that can be coupled to a table and a vibration isolator, comprising:
an upper plate adapted to be attached to the table;
a lower plate adapted to be mounted to the vibration isolator;
an elastomer mounted to said upper plate; and,
a plurality of rollers attached to said lower plate and coupled to said elastomer.
12. The assembly of claim 11, wherein said elastomer has a conical shape.
13. The assembly of claim 11, wherein said lower plate has an adjustable slot coupled to said roller.
14. The assembly of claim 11, wherein said upper plate has an alignment pin that is inserted into an alignment hole of said lower plate.
15. The assembly of claim 11, further comprising an adjustment fastener coupled to said elastomer.