Abstract: The present application discloses a zoom lens assembly having a first static lens group and a second static lens group defining an assembly optical axis secured to a lens support. A first guide member having a first guide member axis is secured to the lens support, and a second guide member having a second guide member axis is secured to the first guide member. A first mobile carriage is slidably coupled to the first guide member and a first mobile lens cell having a first optical axis is secured to the first mobile carriage. A second mobile carriage is slidably coupled to the first guide member, with a second mobile lens cell having a second optical axis secured to the second mobile carriage. The zoom lens assembly further includes a third mobile carriage slidably coupled to the second guide member, with a third mobile lens cell having a third optical axis secured to the third mobile carriage.

Abstract: The present application discloses a zoom lens assembly having a first static lens group and a second static lens group defining an assembly optical axis secured to a lens support. A first guide member having a first guide member axis is secured to the lens support, and a second guide member having a second guide member axis is secured to the first guide member. A first mobile carriage is slidably coupled to the first guide member and a first mobile lens cell having a first optical axis is secured to the first mobile carriage. A second mobile carriage is slidably coupled to the first guide member, with a second mobile lens cell having a second optical axis secured to the second mobile carriage. The zoom lens assembly further includes a third mobile carriage slidably coupled to the second guide member, with a third mobile lens cell having a third optical axis secured to the third mobile carriage.

Abstract: The present application discloses a zoom lens assembly utilizing a novel extension spring configured to exert a biasing force on one or more lens cells during operation thereof. In one embodiment, the extension spring includes a spring body having a coil axis, a first spring end region having a first inner coil and a first outer coil formed on the spring body, wherein the coil axis of the spring body transitions from the first inner coil to the first outer coil. The extension spring further includes a second spring end region having a second inner coil and a second outer coil formed on the spring body, wherein the coil axis of the spring body transitions from the second inner coil to the second outer coil. An intermediate spring region having a plurality of intermediate coils extends from the first spring end region to the second spring end region.