1. A lens-refracting characteristic measuring apparatus, comprising:
a measuring optical device to measure refracting characteristics of eyeglass lenses;
an input device to input a pupillary distance of eyes of a person wearing eyeglasses; and
an arithmetic and control circuit for obtaining refracting characteristics of the eyeglass lenses in positions of centers of right and left pupils of the person wearing the eyeglasses based on the pupillary distance of right and left eyes of the person wearing the eyeglasses input by the input device and the refracting characteristics measured by the measuring optical device.
2. The lens-refracting characteristic measuring apparatus according to claim 1, wherein
the measuring optical device comprises a projecting optical mechanism for projecting light to a lens and a light-receiving optical mechanism for receiving the light from the lens, and
the light receiving optical mechanism comprises a light receiving element which converts a shape of the lens into an image signal, and then inputs the image signal into the arithmetic and control circuit.
3. The lens-refracting characteristic measuring apparatus according to claim 2, wherein the light receiving optical element comprises a charge-coupled device (CCD).
4. The lens-refracting characteristic measuring apparatus according to claim 1, wherein the input device inputs half pupillary distances from a center of a nose to the centers of the right and left pupils of the person wearing the eyeglasses to the arithmetic and control circuit.
5. The lens-refracting characteristic measuring apparatus according to claim 1, further comprising a display device to display at least a measuring result by the arithmetic and control circuit.
6. The lens-refracting characteristic measuring apparatus according to claim 1, further comprising a lens supporting device disposed to support the eyeglass lenses when the eyeglass lenses are measured by the measuring optical device.
7. The lens-refracting characteristic measuring apparatus according to claim 6, wherein the lens supporting device comprises
a tubular lens supporting member disposed in a center of a measuring optical axis of the measuring optical device,
a nose pad supporting member, which supports nose pads of the eyeglasses supported by the tubular lens supporting member, to be movable right and left,
a driving mechanism for driving the nose pad supporting member, and
a displaced amount detecting device to detect a displaced amount of the nose pad supporting member in a right and left direction from the measuring optical axis.
8. The lens-refracting characteristic measuring apparatus according to claim 7, wherein when the displaced amount of the nose pad supporting member based on a displaced amount detecting signal of the displaced amount detecting device agrees with half pupillary distances from a center of a nose to the centers of the right and left pupils of the person wearing the eyeglasses, the arithmetic and control circuit displays the agreement on a display device.
9. The lens-refracting characteristic measuring apparatus according to claim 7, wherein the arithmetic and control circuit controls the driving mechanism based on half pupillary distances from a center of a nose to the centers of the right and left pupils of the person wearing the eyeglasses, and measures the refracting characteristics of the eyeglass lenses by shifting the nose pad supporting member from a measuring optical axis for the half pupillary distances.
10. The lens-refracting characteristic measuring apparatus according to claim 1, wherein when measuring progressive refracting lenses, the arithmetic and control circuit obtains refracting characteristics of portions for distance of the eyeglass lenses in the positions corresponding to half pupillary distances from a center of a nose to the centers of the right and left pupils of the person wearing the eyeglasses.
11. The lens-refracting characteristic measuring apparatus according to claim 1, further comprising a luminous flux dividing mechanism for forming a measuring luminous flux of the measuring optical device in a plurality of measuring luminous flux which is widely distributed, wherein the arithmetic and control circuit obtains a refracting power distribution state by measuring the refracting characteristics in a plurality of portions of the eyeglass lenses based on the plurality of measuring luminous flux, and obtains the refracting characteristics in the positions corresponding to the centers of the right and left pupils of the eyeglass lenses based on the refracting power distribution state and half pupillary distances from a center of a nose to the centers of the right and left pupils of the person wearing the eyeglasses.
12. The lens-refracting characteristic measuring apparatus according to claim 1, wherein when measuring progressive refracting lenses, the arithmetic and control circuit obtains refracting characteristics of portions for distance of the eyeglass lenses based on half pupillary distances from a center of a nose to the centers of the right and left pupils of the person wearing the eyeglasses.
13. The lens-refracting characteristic measuring apparatus according to claim 1, further comprising a shielding device to shield a part of the eyeglass lenses when measuring the eyeglass lenses.
14. The lens-refracting characteristic measuring apparatus according to claim 1, wherein the refracting characteristic is a spherical diopter power, cylindrical degree, or cylindrical axis angle of the eyeglass lenses.
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 method of cooperatively encoding digital data between a plurality of parties, comprising:
encoding a first portion of the digital data in a first encoding scheme by a first of the plurality of parties, the first encoding scheme being implemented by a first encoder known only to the first party and wherein the first portion can be decoded by only the first party;
encoding a second portion of the digital data in a second encoding scheme different than the first encoding scheme and by a second of the plurality of parties, the second encoding scheme being implemented by a second encoder known only to the second party and wherein the second portion can be decoded by only the second party; and
adding noise or padding during the-encoding of the first and second portions, wherein the noise or padding is only known to a single party of the first and second parties who added the noise or padding.
2. The method of claim 1, further including mutually agreeing by the first and second parties to rules for encoding in advance of encoding the first portion and encoding the second portion.
3. The method of claim 1, further including iteratively passing the digital data between the first and the second party until all of the digital data is encoded.
4. The method of claim 1, further including securing the first and second encoding schemes with a third of the plurality of parties.
5. The method of claim 4, further including choreographing by the third party the encoding of the first and second portions.
6. The method of claim 1, further including halting the partially encoding upon a meeting of a halting criterion whereby the encoding of the first and second portions result in encoding by the parties of differing lengths.
7. A system comprising:
a first device comprising a processor and a memory, the memory storing a set of instructions which, when executed by the processor of the first device, causes the first device to encode a first portion of digital data in a first encoding scheme, the first encoding scheme being implemented by a first encoder known only to the first device and wherein the first portion can be decoded by only the first device; and
a second device comprising a processor and a memory, the memory storing a set of instructions which, when executed by the processor of the second device, causes the second device to encode a second portion of the digital data in a second encoding scheme different than the first encoding scheme, the second encoding scheme being implemented by a second encoder known only to the second device and wherein the second portion can be decoded by only the second device, and further comprising adding noise or padding during the encoding of the first and second portions, wherein the noise or padding is only known to a single device of the first and second devices which adds the noise or padding.
8. The system of claim 7, further including iteratively passing the digital data between the first and the second devices until all of the digital data is encoded.
9. The system of claim 7, further including halting the encoding upon a meeting of a halting criterion whereby the encoding of the first and second portions result in encoding by the devices of differing lengths.