摘要:
A compact zoom lens system comprises a front negative lens component and a rear positive lens component with a variable air space between the front and the rear lens components. The front negative lens component consists of two lens elements and the rear lens component consists of two or three lens elements. A plurality of aspherical surfaces are employed for the compact zoom lens system. Furthermore, some zoom lens system includes an additional negative lens component having a weak refractive power behind the rear lens component.
摘要:
A compact zoom lens system comprises from the object side: a first lens component of a positive refractive power; a second lens component of a negative refractive power with a variable air space between the first and second lens components; and a third lens component of a positive refractive power with a variable air space between the second and third lens components. A plurality of aspherical surfaces are employed for the realization of a compact and low-cost zoom lens system. Furthermore, a focusing operation is carried out by both of the first and second lens components or third lens component.
摘要:
A zoom lens system has a first lens unit and a second lens unit from the object side. The first lens unit has a negative optical power. The second lens unit has a positive optical power. The second lens unit is arranged on the image side of the first lens unit. An air space between the first and second units is variable for zooming. The second lens unit has a doublet lens element composed of a positive lens element and a negative lens element cemented together.
摘要:
A zoom lens system is provided with, from the object side, a first lens unit having a negative refractive power, a second lens unit having a positive refractive power and a third lens unit having a negative refractive power. Zooming from a shortest focal length condition to a longest focal length condition is performed by moving all of the lens units while reducing the distance between the first and second lens units and the distance between the second and third lens units. The second lens unit includes three lens elements of a positive lens element, a negative lens element and a positive lens element from the object side.
摘要:
A pneumatic radial tire for a passenger vehicle according to the present invention has an appropriate relationship between a tire cross-sectional width SW and a tire outer diameter OD. Also, a method of using the pneumatic radial tire for a passenger vehicle according to the present invention is to use the above radial tire with at least specified internal pressure.
摘要:
A radio communication terminal 100 includes: a first storage unit 1171 configured to store a PRL list L1 used for connection to a communication provider-provided WLAN provided by a communication provider, a content of the first storage unit 1171 being rewritable by the communication provider; and a second storage unit 1172 configured to store a user registration list L2 used for connection to a user-registered WLAN registered by a user of the radio communication terminal, the second storage unit 1172 being rewritable by the user. The radio communication terminal 100 selects any one of the communication provider-provided WLAN and the user-registered WLAN, based on the PRL list L1 and the user registration list L2.
摘要:
A pneumatic radial tire for a passenger vehicle according to the present invention has an appropriate relationship between a tire cross-sectional width SW and a tire outer diameter OD. Also, a method of using the pneumatic radial tire for a passenger vehicle according to the present invention is to use the above radial tire with at least specified internal pressure.
摘要:
An illumination apparatus including: a power supply circuit which outputs a DC power obtained by rectifying an AC voltage and stepping up the rectified voltage; a light source unit having semiconductor light emitting elements turned on by the DC power; and a housing formed of a conductive material that is grounded through a ground path and on which the power supply circuit and the light source unit are mounted. When one of power feed lines is cut off, the light emitting elements are supplied with an AC power from an AC power source through the ground path and a stray capacitance formed between the light source unit and the housing, and a forward voltage of the light emitting elements has a light emission level hardly recognizable.
摘要:
A zoom lens including first, second, and third lens groups having positive, negative, and positive refractive powers, respectively, which are arranged in that order from the object side to the image side such that, when zooming from wide-angle to telephoto, the first lens group moves to the object side, and spacings between the lens groups change. The third lens group has at least two lenses including a first lens, which is a positive lens arranged closer to the object side than the other lenses of the third lens group. Blur correction is performed by moving the first lens perpendicularly to the optical axis. The third lens group is configured such that the following conditional expression is satisfied: 0.3