# US 12,007,670 B2 · Illuminating unit

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- Number: US 12,007,670 B2
- Document ID: US12007670B2
- Status: Granted
- Kind: B2
- Application number: 17/629,764
- Filed: 2019-07-26
- Published: 2022-08-25
- Granted: 2024-06-11
- Earliest claimed: 2019-07-26
- Assignees: Fuji Corporation
- Applicants: Fuji Corporation
- Inventors: Mitsuhiro Hashimoto
- Web page: https://patentgrep.com/patent/US12007670B2

## CPC

- G03B 15/05: Combinations of cameras with electronic flash apparatus; Electronic flash units
- H05K 13/0812: {the monitoring devices being integrated in the mounting machine, e.g. for monitoring components, leads, component placement}
- G01N 21/95684: {Patterns showing highly reflecting parts, e.g. metallic elements}
- G06V 10/141: Control of illumination
- H04N 23/74: by influencing the scene brightness using illuminating means
- G01N 2021/8845: {Multiple wavelengths of illumination or detection}
- G06V 2201/06: Recognition of objects for industrial automation
- 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)
- H05K: PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- G01N: INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES (measuring or testing apparatus or processes other than immunoassay, involving enzymes or microorganisms C12M, C12Q)
- G06V: IMAGE OR VIDEO RECOGNITION OR UNDERSTANDING
- H04N: PICTORIAL COMMUNICATION, e.g. TELEVISION

## Abstract

An illuminating unit for illuminating an imaging range of a monochromatic camera mounted on a board work machine for working on a board includes a red light source configured to emit a red light, a green light source configured to emit a green light, a blue light source configured to emit a blue light, and a lighting controller configured to adjust independently respective light amounts of the red light source, the green light source, and the blue light source in the same number of gradations within a predetermined dimming range. In the red light source, the green light source, and the blue light source, the upper limit of the dimming range of the light source having the strong light amount is smaller than the upper limit of the dimming range of the light source having the weak light amount.

## Claims

### Claim 1

An illuminating unit for illuminating an imaging range of a monochromatic camera mounted on a board work machine for working on a board, comprising:
a red light source configured to emit a red light;
a green light source configured to emit a green light;
a blue light source configured to emit a blue light; and
a lighting controller configured to adjust independently respective light amounts of the red light source, the green light source, and the blue light source, wherein
a first target light amount of only one of the red light source, the green light source, and the blue light source is multiplied by a dimming coefficient a to obtain a first dimming range,
a second target light amount of only one of the red light source, the green light source, and the blue light source is multiplied by a dimming coefficient β to obtain a second dimming range,
a target light amount of only one of the red light source, the green light source, and the blue light source is multiplied by a dimming coefficient γ to obtain a third dimming range,
α<γ and β<γ, and
the lighting controller adjusts the respective light amounts of the red light source, the green light source, and the blue light source a same number of graduations within the first dimming range, the second dimming range, and the third dimming range.

### Claim 2 (depends on 1)

The illuminating unit according to claim 1, wherein
γ=1,
0<α<1, and
0<β<1.

### Claim 3 (depends on 1)

The illuminating unit according to claim 1,
wherein the red light source, the green light source, and the blue light source are each disposed in a multiple number on an identical plane in such a manner as to shine lights towards a target object from an identical direction to an optical axis of a lens of the monochromatic camera, and
wherein the one of the red light source, the green light source, and the blue light source multiplied by the dimming coefficient γ is provided at a central portion of a disposition of the red light source, the green light source, and blue light source on the plane.

### Claim 4 (depends on 1)

The illuminating unit according to claim 1,
wherein the lighting controller receives a first lighting command inputted thereinto for each light source from a control device of the board work machine to execute a lighting control to light up at least one light source matching the lighting command so inputted in the red light source, the green light source, and the blue light source, and when receiving a second lighting command inputted into the light controller to light up three or more light sources simultaneously, the lighting controller outputs an error without executing the second lighting command.