Supercharge Your Innovation With Domain-Expert AI Agents!

Zoom lens and imaging apparatus

A zoom lens and lens technology, applied in image communication, television, optics, etc., to achieve the effect of miniaturization and cost reduction

Inactive Publication Date: 2011-01-26
FUJI PHOTO OPTICAL CO LTD
View PDF1 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The four-group zoom lens described in Patent Document 1 has room for improvement in terms of miniaturization and cost reduction

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Zoom lens and imaging apparatus
  • Zoom lens and imaging apparatus
  • Zoom lens and imaging apparatus

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0079] In the zoom lens of Example 1, the positive lens L12 closest to the image side in the first lens group G1, the positive meniscus lens L31 in the third lens group G3, and the negative lens closest to the image side in the fourth lens group G4 L43 becomes a resin lens.

[0080] The zoom lens of Example 1 moves the second lens group G2 and the fourth lens group G4 on the optical axis as the magnification is changed, so the values ​​of the surface distances D6 , D10 , D12 , and D17 before and after each group are variable. exist Figure 6 (B) The values ​​at the wide-angle end and the telephoto end are shown as data at the time of zooming of these plane intervals D6 , D10 , D12 , and D17 .

[0081] exist Figure 6 In the lens data of (A), the mark [*] attached to the left side of the surface number indicates that the lens surface has an aspherical shape. In the zoom lens of Embodiment 1, both surfaces S5 and S6 of the positive lens L12 in the first lens group G1, both surf...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

A zoom lens is provided and includes: in order from an object side of the zoom lens, a first lens group adapted to be fixed during power-varying of the zoom lens, the first lens group having a positive power and including in order from the object side, a negative lens, a reflecting member that bends an optical path thereof, and a biconvex lens of a positive lens made of a resin material and havingat least one aspherical surface; a second lens group adapted to move during the power-varying, the second lens group having a negative power and including two lenses; a third lens group adapted to befixed during the power-varying and including one positive lens; and a fourth lens group adapted to move during the power-varying and during focusing of the zoom lens, the fourth lens having a positive power and including in order from the object side, a cemented lens having a positive power, and a negative lens made of a resin material and having at least one aspherical surface and a concave surface on an image side of the fourth lens. -1.0<f2 / fw<-3.0 . . .(1), 2.0<f4 / fw<5.0 . . .(2). The invention can realize small, better optical capability and low cost.

Description

technical field [0001] The present invention relates to a zoom lens and an imaging device suitable for small devices with imaging functions, especially digital still cameras, mobile phones with video cameras, and information portable terminals (PDA: Personal Digital Assistant). Background technique [0002] In recent years, in imaging devices such as digital still cameras, further miniaturization of the device as a whole has been demanded along with miniaturization of imaging elements such as CCD (Charge Coupled Device) and CMOS (Complementary Metal Oxide Semiconductor). Therefore, recently, an imaging device has been developed that bends the optical path of the lens system in the middle and adopts a so-called curved optical system to achieve thinning in the depth direction when it is assembled in the imaging device. [0003] As a zoom lens using a curved optical system, Patent Document 1 describes an example of the structure of four groups of zooms: sequentially from the ob...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): G02B13/00G02B15/177G02B13/18H04N5/225
CPCG02B15/173G02B15/144113
Inventor 佐藤贤一
Owner FUJI PHOTO OPTICAL CO LTD
Features
  • R&D
  • Intellectual Property
  • Life Sciences
  • Materials
  • Tech Scout
Why Patsnap Eureka
  • Unparalleled Data Quality
  • Higher Quality Content
  • 60% Fewer Hallucinations
Social media
Patsnap Eureka Blog
Learn More

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2025 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com