# US 12,111,149 B2 · Opto-mechanical camera position tracking device

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- Number: US 12,111,149 B2
- Document ID: US12111149B2
- Status: Granted
- Kind: B2
- Application number: 18/111,533
- Filed: 2023-02-18
- Published: 2024-05-16
- Granted: 2024-10-08
- Earliest claimed: 2022-11-15
- Applicants: Venkatakrishnan Alwar
- Inventors: Venkatakrishnan Alwar
- Web page: https://patentgrep.com/patent/US12111149B2

## CPC

- G01B 21/22: for measuring angles or tapers; for testing the alignment of axes
- G03B 17/561: {Support related camera accessories}
- G06F 3/012: {Head tracking input arrangements}
- H04N 23/54: Mounting of pick-up tubes, electronic image sensors, deviation or focusing coils
- G01B: MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- 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)
- G06F: ELECTRIC DIGITAL DATA PROCESSING (computer systems based on specific computational models G06N)
- H04N: PICTORIAL COMMUNICATION, e.g. TELEVISION

## Abstract

The present invention relates to an opto-mechanical camera position tracking device which gathers real-time positional data of camera in three dimensional (3D) space and zoom value of the camera lens without using any line of sight or markers and has zero drift. The said camera tracking device attaches to an existing camera crane, detects the necessary positional and optical data, processes it, and sends it to a rendering engine for seamless, real-time visualization.

## Claims

### Claim 1

An opto-mechanical camera position tracking device, the said device comprising:
a dolly wheel encoder unit;
a lens encoder unit;
a pedestal pan encoder unit;
a head pan and tilt encoder unit;
a pedestal tilt encoder unit;
a printed circuit board
characterized by mounted sensors and encoders on jib and camera and gathering of real-time positional data of camera in three-dimensional (3D) space and zoom value of the camera lens without using any line of sight or markers and has zero drift and wherein the dolly wheel encoder unit comprises an encoder, an encoder shaft screw, an encoder wheel, a grub screw, a spring, a trolley wheel extension rod, and a wheel encoder mounting plate and is fixed to the base of the jib pedestal to collect the rotational data of the wheels.

### Claim 2 (depends on 1)

The device as claimed in claim 1, wherein the lens encoder unit comprises: teeth, a drive mounting bracket, an encoder, a hub, and a grub screw and is fixed to the gear teeth of the zoom ring of a camera to collect the rotational data of the gear teeth.

### Claim 3 (depends on 1)

The device as claimed in claim 1, wherein the pedestal pan encoder unit consists of a dolly wheel encoder, a gear, a pinion gear, and a shaft and is connected to the intersecting point of the jib arm and jib pedestal.

### Claim 4 (depends on 1)

The device as claimed in claim 1, wherein the head pan and tilt encoder unit consists of a teeth gear, an arm, an attachment shaft, drive mounting bracket, encoder; a head pan encoder clamp, a head pan encoder clamp connector, a tilt encoder mounting block, a tilt encoder mounting shaft, and a tilt encoder mounting shaft tap and is connected to the jib head having mounted camera.

### Claim 5 (depends on 1)

The device as claimed in claim 1, wherein the pedestal tilt encoder unit consists of an encoder, a pedestal tilt block, a pedestal tilt block arm, a pedestal tilt block connect, and a pedestal tilt block motor mount and is connected to the intersecting point of the jib arm and jib pedestal.

### Claim 6 (depends on 1)

The device as claimed in claim 1, wherein the printed circuit board with the processor is used to compile and synchronize the data and the processed data is sent to the real time rendering machine via the connectivity port for real time visualization.

### Claim 7 (depends on 1)

The device as claimed in claim 1, wherein the tracking data from a camera is streamed to multiple systems simultaneously for additional augmentation.