# US 11,994,654 B2 · Miniature telephoto lens module and a camera utilizing such a lens module

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- Number: US 11,994,654 B2
- Document ID: US11994654B2
- Status: Granted
- Kind: B2
- Application number: 17/389,510
- Filed: 2021-07-30
- Published: 2021-11-18
- Granted: 2024-05-28
- Earliest claimed: 2019-02-14
- Assignees: Corephotonics Ltd.
- Applicants: Corephotonics Ltd.
- Inventors: Gal Shabtay; Ephraim Goldenberg
- Web page: https://patentgrep.com/patent/US11994654B2

## CPC

- G02B 13/001: {Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras (G02B23/243 takes precedence)}
- G02B 7/021: {for more than one lens}
- G02B 9/60: having five components only
- G02B 13/0045: {having five or more lenses}
- G02B 13/02: Telephoto objectives, i.e. systems of the type + - in which the distance from the front vertex to the image plane is less than the equivalent focal length
- G02B 13/06: Panoramic objectives; So-called "sky lenses" {including panoramic objectives having reflecting surfaces}
- G03B 17/00: Details of cameras or camera bodies; Accessories therefor (lens hoods or caps G03B11/04)
- H04N 23/45: for generating image signals from two or more image sensors being of different type or operating in different modes, e.g. with a CMOS sensor for moving images in combination with a charge-coupled device [CCD] for still images
- H04N 23/50: Constructional details
- H04N 23/54: Mounting of pick-up tubes, electronic image sensors, deviation or focusing coils
- G02B 1/041: {Lenses}
- G02B: OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G03B: APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR (optical parts of such apparatus G02B; photosensitive materials or processes for photographic purposes G03C; apparatus for processing exposed photographic materials G03D)
- H04N: PICTORIAL COMMUNICATION, e.g. TELEVISION

## Abstract

The presently disclosed subject matter includes a mobile electronic comprising an integrated camera, comprising a Wide camera unit comprising a Wide lens unit, and a Telephoto camera unit comprising a telephoto lens unit, the telephoto lens unit and the wide lens unit having respectively TTL/EFL ratios smaller and larger than 1 and defining separate telephoto and wide optical paths.

## Claims

### Claim 1

A mobile electronic device comprising an integrated camera, wherein the camera comprises a Wide camera unit comprising a Wide lens unit with a field of view FOVW and having a total track length TTLW and an effective focal length EFLW in the range EFLW=2.5-6 mm, and a Telephoto camera unit comprising a Telephoto lens unit with a Telephoto field of view FOVT, a total track length TTLT and an effective focal length EFLT in the range EFLT=5-12 mm, wherein the TTLT includes a glass window, wherein a ratio TTLW/EFLW is greater than 1, and wherein a ratio TTLT/EFLT is smaller than 1, and wherein the Telephoto lens unit has an optical axis and an optical diameter smaller than 5 mm and a F #smaller than 3.2 and includes a first group of at least three lens elements having, in order from an object plane to an image plane along the optical axis, a first lens element having positive optical power and a pair of second and third lens elements having together negative optical power, and a second group of at least two lens elements, wherein each of the at least two lens elements in the second group is made of different polymer materials having different Abbe numbers.

### Claim 2 (depends on 1)

The mobile electronic device of claim 1, wherein the at least two lens elements of the second group are spaced from one another by an effective air gap smaller than TTLT/50.

### Claim 3 (depends on 1)

The mobile electronic device of claim 1, wherein the Wide and Telephoto camera units are spaced from one another a distance of about 1 mm.

### Claim 4 (depends on 1)

The mobile electronic device of claim 1, wherein TTLT is smaller than 5.5 mm.

### Claim 5 (depends on 1)

The mobile electronic device of claim 1, wherein the first lens element of the Telephoto lens unit has a focal length f1 smaller than TTLT/2.

### Claim 6 (depends on 1)

The mobile electronic device of claim 1, wherein the first, second and third lens elements have respective focal lengths f1, f2 and f3, and wherein the respective focal lengths satisfy the condition 1.2|f3|>|f2|>1.5f1.

### Claim 7 (depends on 1)

The mobile electronic device of claim 1, wherein the Telephoto camera unit includes an image sensor with an image sensor size ¼″ to ⅓″.

### Claim 8 (depends on 2)

The mobile electronic device of claim 2, wherein the Wide and Telephoto camera units are spaced from one another a distance of about 1 mm.

### Claim 9 (depends on 2)

The mobile electronic device of claim 2, wherein TTLT is smaller than 5.5 mm.

### Claim 10 (depends on 2)

The mobile electronic device of claim 2, wherein the first lens element of the Telephoto lens unit has a focal length f1 smaller than TTLT/2.

### Claim 11

A camera, comprising: a Wide camera unit comprising a Wide lens unit with a field of view FOVW and having a total track length TTLW and an effective focal length EFLW in the range 2.5-6 mm, and a Telephoto camera unit comprising a Telephoto lens unit with a Telephoto field of view FOVT, a total track length TTLT and an effective focal length EFLT in the range 5-12 mm, wherein the TTLT includes a glass window, wherein a ratio TTLW/EFLW is greater than 1, and wherein a ratio TTLT/EFLT is smaller than 1, and wherein the Telephoto lens unit has an optical axis and an optical diameter smaller than 5 mm and a F #smaller than 3.2 and includes a first group of at least three lens elements having, in order from an object plane to an image plane along the optical axis, a first lens element having positive optical power and a pair of second and third lens elements having together negative optical power, and a second group of at least two lens elements, wherein each of the at least two lens elements in the second group is made of the different polymer materials.

### Claim 12 (depends on 11)

The camera of claim 11, wherein the at least two lens elements of the second group are spaced from one another by an effective air gap smaller than TTLT/50.

### Claim 13 (depends on 11)

The camera of claim 11, wherein the Wide and Telephoto camera units are spaced from one another a distance of about 1 mm.

### Claim 14 (depends on 11)

The camera of claim 11, wherein TTLT is smaller than 5.5 mm.

### Claim 15 (depends on 11)

The camera of claim 11, wherein the first lens element of the Telephoto lens unit has a focal length f1 smaller than TTLT/2.

### Claim 16 (depends on 11)

The camera of claim 11, wherein the first, second and third lens elements have respective focal lengths f1, f2 and f3, and wherein the respective focal lengths satisfy the condition 1.2|f3|>|f2|>1.5f1.

### Claim 17 (depends on 11)

The camera of claim 11, wherein the Telephoto camera unit includes an image sensor with an image sensor size ¼″ to ⅓″.

### Claim 18 (depends on 12)

The camera of claim 12, wherein the first lens element of the Telephoto lens unit has a focal length f1 smaller than TTLT/2.

### Claim 19 (depends on 12)

The camera of claim 12, wherein the first, second and third lens elements have respective focal lengths f1, f2 and f3, and wherein the respective focal lengths satisfy the condition 1.2|f3|>|f2|>1.5f1.

### Claim 20 (depends on 12)

The camera of claim 12, wherein the Telephoto camera unit includes an image sensor with an image sensor size ¼″ to ⅓″.