1. A wirelessly powered local computing environment, the local computing environment including a near field magnetic resonance wireless power supply arranged to use a resonance channel to transfer useable energy to resonance circuits within a near field distance D, the distance D defining an outermost range of the NFMR power supply, comprising:
a central processing unit, the central processing unit providing processing resources to the NFMR power supply; and
a plurality of peripheral devices each having a tunable resonance circuit suitably adapted to receive power wirelessly from the NFMR power supply, wherein when at least one of the plurality of devices is within range of the NFMR power supply, the device tunes the resonance circuit to at least one of the resonance frequencies of the NFMR power supply and subsequently de-tunes the resonance circuit to provide a device identification to the NFMR power supply using a change in a resonance circuit load factor.
2. The local computing environment as recited in claim 1, wherein at least one of the peripheral devices includes a re-resonator circuit, the re-resonator circuit arranged to wirelessly provide a portion of the power received by the peripheral device from the NFMR power supply to at least one other peripheral client device.
3. A battery charging circuit, comprising:
a first node arranged to receive wirelessly provided power;
a short term charge storage device having a first charge capacity; and
a long term storage device having a second charge capacity, wherein the second charge capacity is substantially greater than the first charge capacity, wherein the long term storage device is charged by,
(A) storing charge corresponding to the power wirelessly received at the first node into the short term charge storage device,
(B) when the stored charge is equal to about the first charge capacity, then passing the stored charge from the short term storage device to the long term storage device, and
(C) repeating (A) and (B) until the charge stored in the long term storage device is about equal to the second charge capacity.
4. The circuit as recited in claim 3, wherein the short term charge storage device is an ultracapacitor and wherein the long term charge storage device is a LiPO battery.
5. A method of wirelessly transmitting power, comprising:
creating a first coupling mode region of an electromagnetic field within a near field of a power supply transmit antenna;
coupling the electromagnetic field and a receiver antenna of a first receiver device within the coupling mode region;
creating a second coupling mode region of the electromagnetic field different from the first coupling mode region within a near field of a transmit antenna of the first receiver device;
coupling the electromagnetic field to a receive antenna of second receiver device in the near field of the transmit antenna of the first receiver device;
wirelessly delivering power from the power supply to the first receiver device by way of the power supply transmit antenna using the first coupling mode region of the electromagnetic field; and
wirelessly delivering at least some of the power wirelessly delivered to the first receiver device is wirelessly by re-transmitting the at least some power to the second receiver device by way of the first receiver transmit antenna using the second coupling mode region of the electromagnetic field.
6. The method as recited in claim 5, wherein the first receiver device is a keyboard.
7. The method as recited in claim 6, wherein the second receiver device is a mouse.
8. The method as recited in claim 7, wherein the power supply is included in a host computing device.
9. The method as recited in claim 8, wherein the second coupling mode region is between the keyboard and the mouse.
10. The method as recited in claim 9, wherein the first coupling mode region is between the host computing device and the keyboard.
11. The method as recited in claim 9, wherein the first coupling mode region is between the host computing device and the mouse.
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. An image pick-up lens system comprising:
an aperture stop;
a first lens; and
a meniscus-shaped second lens having a concave surface on an object side,
wherein, the aperture slop, the first lens and the second lens are aligned in that order from the object side to an image side, the first lens has positive refracting power and has a diffraction grating formed on a convex surface thereof on the image side, and the second lens has positive refracting power.
2. The image pick-up lens system in accordance with claim 1, wherein a surface of the first lens on the object side is aspheric.
3. The image pick-up lens system in accordance with claim 1, wherein the following condition is satisfied:
1.4<Tf<1.7,\u2003\u2003(1)
wherein, f is a focal length of the system, and T is a length from the aperture stop to an image pick-up surface of the image side.
4. The image pick-np lens system in accordance with claim 1, wherein the second lens has ax least one aspheric surface.
5. The image pick-up lens system in accordance with claim 1, wherein the second lens is aspheric on both the concave surface thereof and another major surface thereof.
6. The image pick-up lens system in accordance with claim 4, wherein the following conditions are satisfied:
0.5<f1f<0.8,\u2003\u2003(2) and
0.002<R2R1<0.300,\u2003\u2003(3)
wherein, f1 is a focal length of the first lens, R1 is an absolute value of a radius of curvature of a first surface of the first lens on the object side, and R2 is an absolute value of a radius of curvature of the convex surface of the first lens on the image side.
7. The image pick-up lens system in accordance with claim 1, wherein the first lens satisfies the following condition:
\u22120.5<R3fx(n\u22121)<\u22120.2,\u2003\u2003(1)
wherein, R3 is an absolute value of a radius of curvature of a third surface of the second lens on the object side, f is a focal length of the system, and n is a refractive index of a material of the first lens.
8. The image pick-up lens system in accordance with claim 1, wherein the following condition is satisfied:
\u2212450<C2\xd7(f1Rn2)<\u2212250,\u2003\u2003(1)
wherein, C2 is the power phase coefficient of the phase function of the diffraction grating surface of the first lens, f1 is a focal length of the first lens, and Rn is a normalization radius of the diffraction grating.
9. The image pick-up lens system in accordance with claim 1, wherein the first and second lenses are made front a same plastic or a same resin.
10. The image pick-up lens system in accordance with claim 9, wherein the first and second Lenses are made from a polyolefin resin or cyclo-olefin polymer material having low water absorbency.
11. An image pick-up lens system comprising:
an aperture stop;
a first lens; and
a meniscus-shaped second lens having a concave surface on an object side,
wherein the aperture stop, the first lens and the second lens are aligned in that order from the object side to an image side, the first lens has positive refracting power and has a diffraction grating formed on a convex surface on the image side, and the second lens has negative refracting power.
12. The image pick-up lens system in accordance with claim 11, wherein a surface of the first lens on the object side is aspheric.
13. The image pick-up lens system in accordance with claim 11, wherein the following condition is satisfied:
1.4<Tf<1.7,\u2003\u2003(1)
wherein, f is a focal length of the system, T is a length from the aperture stop to an image pick-up surface of the image side.
14. The image pick-up lens system in accordance with claim 11, wherein the second lens has at least one aspheric surface.
15. The image pick-up lens system in accordance with claim 11, wherein the second lens is aspheric on both the concave surface thereof and a surface thereof on the image side.
16. The image pick-up lens system in accordance with claim 15, wherein the following conditions are satisfied:
0.5<f1f<0.8,\u2003\u2003(2) and
0.002<R2R1<0.300,\u2003\u2003(3)
wherein, f1 is a focal length of the first lens, R1 is an absolute value of a radius of curvature of a first surface of the first lens on the object side, and R2 is an absolute value of a radius of curvature of the convex surface of the first lens on the image side.
17. The image pick-up lens system in accordance with claim 11, wherein the first lens satisfies the following condition:
\u22120.5<R3fx(n\u22121)<\u22120.2,\u2003\u2003(1)
wherein, R3 is an absolute value of a radius of curvature of a third surface of the second lens on the object side, f is a focal length of the system, and n is a refractive index of a material of the first lens.
18. The image pick-up lens system in accordance with claim 11, wherein the following condition is satisfied:
\u2212450<C2\xd7(f1Rn2)<\u2212250,\u2003\u2003(1)
wherein, C2 is the power phase coefficient of the phase function of the diffraction grating surface of the first lens, f1 is a focal length of the first lens, and Rn is a normalization radius of the diffraction grating.
19. An image pick-up lens system comprising:
an aperture stop providing a light path therethrough;
a first lens disposed next to said aperture stop in said light path and having at least one diffraction grating formed in said light path; and
a meniscus-shaped second lens disposed next to said first lens and located in said light path, and having a convex surface facing an image pickup surface and being distal from said first lens in said light path, wherein the following condition is satisfied:
\u2212450<C2\xd7(f1Rn2)<\u2212250,\u2003\u2003(1)
wherein, C1 is the power phase coefficient of the phase function of the diffraction grating surface of the first lens, f1 is a focal length of the first lens, and Rn is a normalization radius of the at least one diffraction grating.
20. The image pick-up lens system in accordance with claim 19, wherein the followings condition is satisfied:
1.4<Tf<1.7;\u2003\u2003(2)
wherein f is a focal length of said system, and T is a length from said aperture stop to said image pick-up surface along said light path.