1. A variable magnification optical system for forming an optical image of an object on a light-receiving surface of an image sensor, said variable magnification optical system includes: from an object side, at least a first lens unit having a positive optical power, a second lens unit having a negative optical power, a third lens unit having a positive optical power, and a fourth lens unit having a positive optical power,
wherein, in magnification variation from a wide angle end to a telephoto end, at least the first lens unit moves,
wherein the variable magnification optical system has a five-unit construction including a fifth lens unit which has a positive optical power and which is arranged to an image side of the fourth lens unit,
wherein, in variable magnification from the wide angle end to the telephoto end, the fifth lens unit is kept in fixed position, and
wherein conditional formulae (1) and (2) below are fulfilled,
6.0<flfw<20.0\u2003\u2003(1)
1.83<Ndave\u2003\u2003(2)
where
fl represents a focal length of the first lens unit,
fw represents a focal length of the entire system at the wide angle end, and
Ndave represents an average refractive index for a d-line among all lens elements included in the second lens unit.
2. The variable magnification optical system according to claim 1,
wherein the fifth lens unit consists essentially of one positive lens element.
3. A variable magnification optical system for forming an optical image of an object on a light-receiving surface of an image sensor, said variable magnification optical system includes: from an object side, at least a first lens unit having a positive optical power, a second lens unit having a negative optical power, a third lens unit having a positive optical power, and a fourth lens unit having a positive optical power,
wherein, in magnification variation from a wide angle end to a telephoto end, at least the first lens unit moves, and
wherein conditional formulae (1), (2a), and (5) below are fulfilled:
6.0<flfw<20.0\u2003\u2003(1)
1.85<Ndave\u2003\u2003(2a)
0.735<Y\u2032fw\u2003\u2003(5)
where
fl represents a focal length of the first lens unit,
fw represents a focal length of the entire system at the wide angle end,
Ndave represents an average refractive index for a d-line among all lens elements included in the second lens unit, and
Y\u2032 represents the maximum image height.
4. A variable magnification optical system for forming an optical image of an object on a light-receiving surface of an image sensor, said variable magnification optical system includes: from an object side, at least a first lens unit having a positive optical power, a second lens unit having a negative optical power, a third lens unit having a positive optical power, and a fourth lens unit having a positive optical power,
wherein, in magnification variation from a wide angle end to a telephoto end, at least the first lens unit moves, and
wherein conditional formulae (1), (2) and (4) below are fulfilled:
6.0<flfw<20.0\u2003\u2003(1)
1.83<Ndave\u2003\u2003(2)
ftfw<17.467\u2003\u2003(4)
where
fl represents a focal length of the first lens unit,
Ndave represents an average refractive index for a d-line among all lens elements included in the second lens unit,
ft represents a focal length of the entire system at the telephoto end, and
fw represents the focal length of the entire system at the wide angle end.
5. An image taking apparatus comprising a variable magnification optical system for forming an optical image of an object, and an image sensor for converting the optical image into an electrical signal,
wherein the variable magnification optical system includes: from an object side, at least a first lens unit having a positive optical power, a second lens unit having a negative optical power, a third lens unit having a positive optical power, and a fourth lens unit having a positive optical power,
wherein, in magnification variation from a wide angle end to a telephoto end, at least the first lens unit moves,
wherein the variable magnification optical system has a five-unit construction including a fifth lens unit which has a positive optical power and which is arranged to an image side of the fourth lens unit,
wherein, in variable magnification from the wide angle end to the telephoto end, the fifth lens unit is kept in fixed position, and
wherein conditional formulae (1) and (2) below are fulfilled,
6.0<flfw<20.0\u2003\u2003(1)
1.83<Ndave\u2003\u2003(2)
where
fl represents a focal length of the first lens unit,
fw represents a focal length of the entire system at the wide angle end, and
Ndave represents an average refractive index for a d-line among all lens elements included in the second lens unit.
6. The image taking apparatus according to claim 5
wherein the fifth lens unit consists essentially of one positive lens element.
7. An image taking apparatus comprising a variable magnification optical system for forming an optical image of an object, and an image sensor for converting the optical image into an electrical signal,
wherein the variable magnification optical system includes: from an object side, at least a first lens unit having a positive optical power, a second lens unit having a negative optical power, a third lens unit having a positive optical power, and a fourth lens unit having a positive optical power,
wherein, in magnification variation from a wide angle end to a telephoto end, at least the first lens unit moves,
wherein conditional formulae (1), (2a), and (5) below are fulfilled:
6.0<flfw<20.0\u2003\u2003(1)
1.85<Ndave\u2003\u2003(2a)
0.735<Y\u2032fw\u2003\u2003(5)
where
fl represents a focal length of the first lens unit,
fw represents a focal length of the entire system at the wide angle end,
Ndave represents an average refractive index for a d-line among all lens elements included in the second lens unit, and
Y\u2032 represents the maximum image height.
8. An image taking apparatus comprising a variable magnification optical system for forming an optical image of an object, and an image sensor for converting the optical image into an electrical signal,
wherein the variable magnification optical system includes: from an object side, at least a first lens unit having a positive optical power, a second lens unit having a negative optical power, a third lens unit having a positive optical power, and a fourth lens unit having a positive optical power,
wherein, in magnification variation from a wide angle end to a telephoto end, at least the first lens unit moves,
wherein conditional formulae (1), (2), (4) and (5) below are fulfilled:
6.0<flfw<20.0\u2003\u2003(1)
1.83<Ndave\u2003\u2003(2)
ftfw<10\u2003\u2003(4)
0.735<Y\u2032fw\u2003\u2003(5)
where
fl represents a focal length of the first lens unit,
Ndave represents an average refractive index for a d-line among all lens elements included in the second lens unit,
ft represents a focal length of the entire system at the telephoto end,
fw represents the focal length of the entire system at the wide angle end, and
Y\u2032 represents the maximum image height.
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 for processing a call setup message in a communication network, comprising:
receiving, by a processor in the communication network, the call setup message from an endpoint device of a calling party to a called party;
verifying, by the processor, the calling party is associated with a valued customer status and the called party is a registered retailer based upon the call setup message; and
processing, by the processor, the call setup message in accordance with a registered service logic when the calling party is associated with the valued customer status and the called party is the registered retailer instead of processing the call setup message in accordance with a service logic associated with a regular customer status, wherein the registered service logic directs a call to a live attendant.
2. The method of claim 1, wherein the communication network is a voice over Internet protocol network.
3. The method of claim 1, further comprising:
registering a phone number of the calling party as being associated with the valued customer status; and
registering a phone number of the called party as being associated with the registered retailer.
4. The method of claim 3, wherein the phone number of the called party is a toll-free phone number.
5. The method of claim 3, wherein the phone number of the called party is a toll phone number.
6. The method of claim 1, wherein the calling party being associated with the valued customer status is selectively set by the calling party.
7. The method of claim 1, wherein the calling party being associated with the valued customer status is selectively set by the called party.
8. The method of claim 1, wherein the registered service logic is retrieved from an application server by a call control element.
9. The method of claim 8, wherein the registered service logic comprises service logic for forwarding the call setup message to a preferred translated destination number set by the called party.
10. The method of claim 1, further comprising:
sending a caller identification of the calling party to the called party.
11. The method of claim 10, wherein the caller identification is used by the called party to verify the valued customer status.
12. A tangible computer-readable medium storing instructions which, when executed by a processor in a communication network, cause the processor to perform operations for processing a call setup message in the communication network, the operations comprising:
receiving the call setup message from an endpoint device of a calling party to a called party;
verifying the calling party is associated with a valued customer status and the called party is a registered retailer based upon the call setup message; and
processing the call setup message in accordance with a registered service logic when the calling party is associated with the valued customer status and the called party is the registered retailer instead of processing the call setup message in accordance with a service logic associated with a regular customer status, wherein the registered service logic directs a call to a live attendant.
13. The tangible computer-readable of claim 12, further comprising:
registering a phone number of the calling party as being associated with the valued customer status; and
registering a phone number of the called party as being associated with the registered retailer.
14. The tangible computer-readable of claim 13, wherein the phone number of the called party is a toll-free phone number.
15. The tangible computer-readable of claim 13, wherein the phone number of the called party is a toll phone number.
16. The tangible computer-readable of claim 12, wherein the calling party being associated with the valued customer status is selectively set by the calling party.
17. The tangible computer-readable of claim 12, wherein the calling party being associated with the valued customer status is selectively set by the called party.
18. The tangible computer-readable of claim 12, further comprising:
sending a caller identification of the calling party to the called party.
19. The tangible computer-readable of claim 18, wherein the caller identification is used by the called party to verify the valued customer status.
20. A network element for processing a call setup message, where the network element is deployed in a communication network, the network element comprising:
a processor; and
a computer-readable medium storing instructions which, when executed by the processor, cause the processor to perform operations, the operations comprising:
receiving the call setup message from an endpoint device of a calling party to a called party;
verifying the calling party is associated with a valued customer status and the called party is a registered retailer based upon the call setup message; and
processing the call setup message in accordance with a registered service logic when the calling party is associated with the valued customer status and the called party is the registered retailer instead of processing the call setup message in accordance with a service logic associated with a regular customer status, wherein the registered service logic directs a call to a live attendant.