JPH1042303A - Image pickup device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain respective RGB signals on the black/white CCD chip veneer (black/white image pickup element) without using an actuator by constituting a device by means of the black/white image pickup element, a lens, optical shutters, color filters for red, green and blue transmission, a time division control means and a color signal conversion means. SOLUTION: An object 9 is image-formed on the black/white image pickup element 1 by the lens 2. When the transmission of light is time-divisionally and sequentially switched by the optical shutters 3-5, only the light of partial areas between (c)-(d), between (d)-(e) and between (e)-(f) in the lens 2 time- divisionally passes through. Only red light, green light and blue light in the transmission light of the optical shutters 3-5 pass through by the red transmission color filters 6, the green transmission color filter 7 and the blue transmission color filter 8. Consequently, the red image 10, the green image 11 and the blue image 12 of the object 9 are time-divisionally and sequentially switched and are image-formed on the black/white image pickup element 1. The output of the black/white image pickup element 1 is converted into an arbitrary color image signal in a color signal conversion circuit 15.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

[0001] 1. Field of the Invention [0002] The present invention relates to an improvement in resolution of an image pickup apparatus using one image pickup device.

[0002]

2. Description of the Related Art In order to improve the resolution of an image pickup device using a solid-state image sensor such as a CCD used in an image pickup device, it is conceivable to increase the number of pixels, shift pixels, or increase the number of boards.

[0003] Among them, the increase in the number of pixels and the shift of pixels are items that are determined at the time of manufacturing the image sensor. As a method for improving the resolution of the image pickup apparatus to be higher than the resolution of the image pickup element itself using an existing image pickup element, there is a multi-plate type such as a two-plate type or a three-plate type. However, the increase in the number of boards causes an increase in cost because two or three imaging elements are used.

To solve such a problem, FIG. 24 shows, for example, the Journal of the Institute of Television Engineers of Japan, Vol. 41, No. 1
1 (1987) p88-p94, a principle view of a conventional image pickup device shown in a color synchro vision CCD image sensor viewed obliquely from above, in which swing imaging in which a CCD chip is periodically vibrated left and right by a bimorph piezoelectric actuator. It is configured as an element. In the figure, 43 is a swing image sensor, 44 is a CCD chip of the swing image sensor 43, 45 is an actuator, and 46 is C
The stem, which is the base of the CD chip 41, is a vibrating C
A flexible cable 48 for inputting and outputting signals from the CD chip 41, and 48 are input / output pins.

In a conventional image pickup apparatus using such a swing image pickup device 43, the actuator 45 periodically vibrates the CCD chip 44 in the horizontal direction on the reproduced image, thereby reducing the pixel pitch by 1 / horizontal in the horizontal direction. A spatial sampling point is obtained at position 2. As a result, the spatial sampling points in the horizontal direction are doubled as compared with the case without vibration, and the horizontal limit resolution can be doubled.
The resolution of a single-chip image sensor can be increased. When the CCD chip 44 is monochrome, the luminance signal is doubled, and when the CCD chip 44 is color, the RGB color signals are doubled.

[0006]

The conventional image pickup apparatus using the above-described swing image pickup device has a problem that power consumption is large because an actuator is used to vibrate the CCD chip.

Further, there is a problem that RGB color signals cannot be obtained with a monochrome CCD chip.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-described problems. A first object of the present invention is to provide an image pickup apparatus capable of obtaining RGB color signals from a single monochrome CCD chip without using an actuator. Is what you get.

A second object of the present invention is to provide an image pickup apparatus which improves the horizontal resolution of each of the RGB color signals obtained from a single monochrome CCD chip without using an actuator.

A third object of the present invention is to provide an image pickup apparatus which improves the vertical resolution of each of the RGB color signals obtained from a single monochrome CCD chip without using an actuator.

A fourth object of the present invention is to provide an image pickup apparatus which improves the resolution in both the horizontal and vertical directions of each of the RGB color signals obtained from a single monochrome CCD chip without using an actuator.

A fifth object of the present invention is to provide an image pickup device which obtains each of RGB color signals from a single monochrome CCD chip without using an actuator, and which has a small color shift.

A sixth object of the present invention is to provide an image pickup apparatus which improves the horizontal resolution by doubling the spatial sampling points in the horizontal direction of a video signal obtained from a single CCD chip without using an actuator. It is.

A seventh object is to improve the vertical resolution by doubling the spatial sampling points in the vertical direction of a video signal obtained from a single CCD chip without using an actuator. Is what you get.

An eighth object is to double the spatial sampling points in both the horizontal and vertical directions of a video signal obtained from a single CCD chip without using an actuator, thereby achieving resolution in both the horizontal and vertical directions. It is intended to obtain an imaging device capable of improving the image quality.

A ninth object is to provide an imaging apparatus which can increase the number of spatial sampling points of a video signal obtained from a single CCD chip to three times or more without using an actuator.

A tenth object is to provide an imaging apparatus which obtains a video signal with improved resolution from a single CCD chip without using an actuator.

An eleventh object is to provide an image pickup apparatus for obtaining a video signal with improved resolution from a single CCD chip without using an actuator, which can be provided with an auto-focus or zoom lens or an interchangeable lens. An imaging device is obtained.

A twelfth object of the present invention is to obtain an imaging device having a short depth in an imaging device for obtaining a video signal with improved resolution from a single CCD chip without using an actuator.

[0020]

In an image pickup apparatus according to the present invention, a black-and-white image pickup device, a lens for forming an image of a subject on the black-and-white image pickup device, and an optical shutter having a lens surface arranged in each of three divided areas are provided. A color filter for transmitting red light, a color filter for transmitting green light, a color filter for transmitting blue light, a time-division control means for sequentially switching the optical shutter in a time-division manner, and a black-and-white video signal output by a monochrome image sensor. It is constituted by a color signal converting means for converting into an arbitrary standardized color video signal.

The lenses are divided into a green split lens and a red-blue split lens, which are horizontally separated from each other.

Further, the split lens for green and the split lens for red and blue are arranged so as to be separated in the vertical direction.

Further, the split lens for green and the split lens for red and blue are arranged to be separated in an oblique direction.

Further, the lenses are divided into a green split lens, a red split lens and a blue split lens, which are horizontally separated from each other.

Further, the split lens for green, the split lens for red and the split lens for blue are arranged apart from each other in the vertical direction.

The split lens for green, the split lens for red, and the split lens for blue are arranged to be separated in an oblique direction.

The time division control means is a high-speed time division control means for performing time division at twice or more the number of images.

Also, an image pickup device, a divided lens in which the lens is divided into two and arranged horizontally apart, an optical shutter arranged for each divided lens, and time division control means for alternately switching the optical shutter in a time division manner. And a signal conversion means for converting a video signal output from the image sensor into a high-resolution video signal.

In addition, the lens is divided into two parts and arranged vertically apart.

Further, the lens is divided into two parts and arranged at an oblique distance.

Further, the lens is divided into a plurality of parts and arranged separately.

Further, the lens is a multiple imaging lens for obtaining an image at a plurality of shifted positions.

Further, the camera is provided with a relay lens.

Further, a reflection mirror is provided.

[0035]

DESCRIPTION OF THE PREFERRED EMBODIMENTS In an image pickup apparatus according to an embodiment of the present invention, a monochrome image pickup device, a lens, an optical shutter, a red transmission color filter, a green transmission color filter, and a blue transmission color filter are provided. Since it is composed of the time division control means and the color signal conversion means, it is possible to form a red image, a green image and a blue image at the same position on the monochrome image sensor by time division.

Further, since the lenses are divided into a green split lens and a red-blue split lens, which are horizontally separated from each other, the green image and the red-blue image are shifted by half a pixel in the left-right direction. Can be imaged.

Further, since the split lens for green and the split lens for red and blue are arranged in the vertical direction, the green image and the red and blue image can be formed by being shifted vertically by 1/2 pixel.

Further, since the split lens for green and the split lens for red and blue are arranged in the oblique direction, the green image and the red and blue image can be formed by being shifted in the oblique direction by 1/2 pixel.

Further, since the lenses are divided into a green split lens, a red split lens and a blue split lens, which are arranged horizontally apart from each other, the green image, the red image and the blue image are each reduced by 1/3. An image can be formed by shifting in the horizontal direction by each pixel.

Further, since the split lens for green, the split lens for red and the split lens for blue are arranged in the vertical direction, the green image, the red image and the blue image are each separated by 1/3 pixel in the vertical direction. To form an image.

Also, since the green split lens, the red split lens, and the blue split lens are arranged in the oblique direction, the green image, the red image, and the blue image are obliquely shifted by 1/3 pixel each. The image can be shifted.

Further, since the time division control means is a high-speed time division control means for performing time division at twice or more the number of images formed, the change of the green image, the red image and the blue image due to the movement of the subject can be leveled. Can be.

Further, an image pickup device, a split lens in which the lens is divided into two and horizontally separated, an optical shutter,
Since it is composed of the time-division control means and the signal conversion means, two images can be formed on the image sensor by being shifted in the horizontal direction by 1/2 pixel in a time-division manner.

Also, since the lens is divided into two and divided vertically and arranged separately, two images are formed on the image sensor by being shifted in the vertical direction by 1/2 pixel in a time-division manner. Can be.

Further, since the lens is divided into two and divided lenses are arranged diagonally apart from each other, two images can be formed on the image sensor by shifting the pixels diagonally by 1/2 pixel in a time division manner. Can be.

Further, since the lenses are divided into a plurality of parts and arranged separately, a plurality of images can be formed on the image sensor at time-division shifted positions.

Further, since the lens is a plurality of imaging lenses for forming images at a plurality of shifted positions, a single lens forms a plurality of images on the image sensor at time-divisionally shifted positions. can do.

Further, since a relay lens is provided, an autofocus or zoom lens or an interchangeable lens mechanism can be provided.

Further, since the reflecting mirror is provided, the optical path between the lens and the image pickup device can be bent.

Hereinafter, the present invention will be described in detail with reference to the drawings showing the embodiments. Embodiment 1 FIG. FIG. 1 is a principle view of an image pickup apparatus according to Embodiment 1 of the present invention as viewed from above. In the figure, reference numeral 1 denotes a black-and-white image sensor, and 1a denotes a pixel of the black-and-white image sensor 1. Reference numeral 2 denotes a lens for forming an image of a subject on the black-and-white image sensor 1;
Reference numerals 4 and 5 denote optical shutters for controlling the light transmitted through each of the three divided regions of the lens 2 in an interdigital manner.
A color filter for transmitting blue light, a color filter for transmitting green light, a color filter for transmitting blue light, 9 is a subject,
Reference numerals 11 and 12 denote a red image, a green image, and a blue image formed on the black-and-white image sensor 1, respectively. 13 denotes a video processing circuit, and a time-division control circuit 14 for sequentially switching the optical shutters 3, 4, and 5 in a time-division manner. And a color signal conversion circuit for converting a black-and-white video signal output from the black-and-white image sensor 1 into an arbitrary standardized color video signal. 2A and 2B are diagrams illustrating time division of the imaging apparatus according to the first embodiment. FIG. 2A illustrates an output of the monochrome image sensor 1 and FIG. 2B illustrates a video signal processing circuit 1.
3 shows the output. FIG. 3 is a perspective view of the imaging device according to the first embodiment.

Next, the operation will be described with reference to FIGS. As shown in FIG. 1, the subject 9 is
To form an image on the monochrome image sensor 1. For example, subject 9
Of the self-luminous light or reflected light emitted in all directions from the points a and b of FIG.
All are caused by the refraction of the lens, and the point g and the point h, respectively.
Then, an image of the subject 9 is created. That is, cd of the lens 2
Regarding the respective image formations by the partial regions between, de and ef, the same image of the subject 9 is formed at the same position of the points g and h according to the light amount.

When the transmission of light is sequentially switched by the optical shutters 3, 4, and 5 in a time-division manner, the interval between cd and de of the lens 2,
Only the light in the partial region between e and f passes in time division. The transmitted light of the optical shutters 3, 4, and 5 is transmitted by the red transmission color filter 6, the green transmission color filter 7, and the blue transmission color filter 8, respectively, so that only red light, green light, and blue light are transmitted. As a result, a red image 10, a green image 11, and a blue image 12 of the subject 9 are formed on the black-and-white image sensor 1 while being sequentially switched in a time-division manner.

The black-and-white image sensor 1 is controlled by a time-division control circuit 14 so that a red image 10, a green image 11, and a blue image 12
Is recognized as a black-and-white image, and is sequentially switched and output in time division. The frequency of the time division is as shown in FIG.
The output is three times the standardized color video signal.
By converting the output of the black-and-white image sensor 1 into an arbitrary standardized color video signal by the color signal conversion circuit 15,
A high-resolution color video signal can be obtained from the monochrome image sensor 1.

Embodiment 2 FIG. 4 is a perspective view of an imaging device according to the second embodiment of the present invention, and the first embodiment is described.
Divided areas of the lens 2 by the optical shutters 3, 4, and 5
It is radial. By making the divided areas radial, it is possible to reduce a difference between the red image 10, the green image 11, and the blue image 12 of the subject 9 due to characteristics such as aberration of the lens 2.

Embodiment 3 FIG. 5 is a principle view of the imaging device according to the third embodiment of the present invention viewed from above, and FIG. 6 is a perspective view of the imaging device according to the third embodiment of the present invention. The green split lens 1 is a green split lens and a red-blue split lens obtained by dividing the lens 2 of the first embodiment into a green light transmitting area and a red blue light transmitting area.
6, a green image 11 and a red-blue split lens 17
The split lens for green 16 and the split lens for red and blue 17 are separated from each other so that the red image 10 and the blue image 12 are shifted horizontally by 1/2 pixel on the black-and-white image sensor 1. Are located. Reference numeral 18 denotes high-resolution color signal conversion means for converting a black-and-white video signal output from the black-and-white image sensor 1 into an arbitrary standardized high-resolution color video signal by forming an image with shifted pixels.

Next, the operation will be described with reference to FIG. As shown in FIG. 5, the green split lens 16 forms a green image 11 by the optical shutter 4 and the green transmission color filter 7, and the red / blue split lens 17 is formed by the optical shutters 3 and 5 and the red transmission color filter. 6. A red image 10 and a blue image 12 are formed by the blue transmission color filter 8. Green split lens 16 and red-blue split lens 17 split from one lens
Are arranged in the horizontal direction so that the green image 11, the red image 10, and the blue image 12 substantially overlap, but are slightly shifted in the horizontal direction to form an image. By arranging the green split lens 16 and the red-blue split lens 17 such that the shift between the green image 11, the red image 10 and the blue image 12 is shifted by 画素 pixel, the horizontal image obtained from the monochrome image sensor 1 can be obtained. The number of spatial sampling points in the direction can be increased. By converting the output of the black-and-white image sensor 1 into an arbitrary standardized color video signal by the high-resolution color signal conversion circuit 18, a color video signal having a higher horizontal resolution than that obtained by using the lens 2 which is not divided can be obtained. Can be.

Embodiment 4 FIG. FIG. 7 is a perspective view of an image pickup apparatus according to Embodiment 4 of the present invention, and is similar to Embodiment 3 described above.
The green image formed by the green split lens 16 and the red image and the blue image formed by the red-blue split lens 17 are
The split lens for green 16 and the split lens for red and blue 17 are arranged apart from each other so that an image is formed on the black-and-white image sensor 1 with a shift of 1/2 pixel in the vertical direction. As a result, by increasing the number of spatial sampling points in the vertical direction obtained from the monochrome image sensor 1, a color video signal with a high vertical resolution can be obtained.

Embodiment 5 FIG. FIG. 8 is a perspective view of an imaging apparatus according to the fifth embodiment of the present invention, and the third embodiment is described.
The green image formed by the green split lens 16 and the red image and the blue image formed by the red-blue split lens 17 are
The split lens for green 16 and the split lens for red and blue 17 are arranged apart from each other so that an image is formed on the black-and-white image sensor 1 with a shift of 1/2 pixel in the oblique direction. As a result, by increasing the number of spatial sampling points in both the horizontal and vertical directions obtained from the monochrome image sensor 1, a color video signal with high horizontal and vertical resolution can be obtained.

Embodiment 6 FIG. FIG. 9 is a principle view of an imaging device according to Embodiment 6 of the present invention as viewed from above, and FIG. 10 is a perspective view of the imaging device according to Embodiment 3 of the present invention. The red-blue split lens 17 according to the third embodiment is a red split lens and a blue split lens divided by a red light transmitting area and a blue light transmitting area, and the green image 11 formed by the green split lens 16 is formed. The red image 10 formed by the red split lens 19 and the blue image 12 formed by the blue split lens 20 are horizontally shifted by 1/3 pixel on the monochrome image sensor 1. Thus, the green split lens 16 and the red split lens 19
And the red-blue split lens 20 are disposed apart from each other.

Next, the operation will be described with reference to FIG. As shown in FIG. 9, the green split lens 16 forms a green image 11 by the optical shutter 4 and the green transmission color filter 7, and the red split lens 19 is formed by the optical shutter 3 and the red transmission color filter 6. An image 10 is formed, and the blue splitting lens 20 is turned by the blue transmission color filter 8 into a blue image 12.
Is imaged. The green image 11 and the red image 1 can be obtained by arranging the green split lens 16, the red split lens 19, and the blue split lens 20 separated from one lens in the horizontal direction.
Although the 0 and the blue image 12 substantially overlap, they are slightly shifted in the horizontal direction and formed. By arranging the green split lens 16, the red split lens 19, and the blue split lens 20 such that the shifts of the green image 11, the red image 10, and the blue image 12 are shifted by 1/3 pixel, respectively, The number of spatial sampling points in the horizontal direction obtained from the image sensor 1 can be increased. By converting the output of the black-and-white image sensor 1 into an arbitrary standardized color video signal by the high-resolution color signal conversion circuit 18, a color video signal having a higher horizontal resolution than that obtained by using the lens 2 which is not divided can be obtained. Can be.

Embodiment 7 FIG. FIG. 11 is a perspective view of an imaging apparatus according to Embodiment 7 of the present invention, and illustrates a green image 11 formed by the green split lens 16 of Embodiment 6 described above.
A red image 10 formed by the red split lens 19 and a blue image 12 formed by the blue split lens 20 are formed on the black-and-white image sensor 1 by being shifted by 1/3 pixel in the vertical direction. As described above, the split lens for green 16, the split lens for red 19, and the split lens for red and blue 20 are arranged apart from each other. As a result, by increasing the number of spatial sampling points in the vertical direction obtained from the monochrome image sensor 1, a color video signal with a high vertical resolution can be obtained.

Embodiment 8 FIG. FIG. 12 is a perspective view of an imaging apparatus according to Embodiment 8 of the present invention, and illustrates a green image 11 formed by the green split lens 16 of Embodiment 3 described above.
A red image 10 formed by the red split lens 19 and a blue image 12 formed by the blue split lens 20 are formed on the black-and-white image sensor 1 with a shift of 1/3 pixel in an oblique direction. As described above, the split lens for green 16, the split lens for red 19, and the split lens for red and blue 20 are arranged apart from each other. As a result, by increasing the number of spatial sampling points in both the horizontal and vertical directions obtained from the monochrome image sensor 1, a color video signal with high horizontal and vertical resolution can be obtained.

Embodiment 9 FIG. FIG. 13 is a diagram illustrating the principle of an imaging apparatus as an example of the ninth embodiment of the present invention viewed from above. The time division control circuit 14 according to the first embodiment performs time division at twice or more the number of imagings. This is a high-speed time-division control circuit. In the figure, reference numeral 21 denotes a high-speed time division control circuit. FIGS. 14A and 14B are diagrams showing time division of an imaging device as an example of the ninth embodiment. FIG. 14A shows the output of the image sensor 1 and FIG. 14B shows the output of the video signal processing circuit 13.

Next, the operation will be described with reference to FIG. As shown in FIG. 14A, even if the green image 11, the red image 10, and the blue image 12 formed in a time-division manner are displaced by the movement of the subject 9, the video signal processing circuit 13 By leveling the green image 11, the red image 10, and the blue image 12 obtained two each in one output frame, the color shift can be reduced.

By the way, in the example of FIG. 14, the time division is doubled with respect to the time division control circuit 14 of the high-speed time division control circuit 39. However, it goes without saying that the time division may be divided three times or more.

Embodiment 10 FIG. FIG. 15 is a principle diagram of the imaging apparatus according to the tenth embodiment of the present invention viewed from above.
In the figure, reference numeral 22 denotes a monochrome or color image sensor,
a is a pixel of the image sensor 22. Reference numerals 23 and 24 divide the lens 2 of the first embodiment into two parts, and separate them so that the subject 9 forms two images on the image sensor 22 at positions shifted by half a pixel in the horizontal direction. Split lens, 2
Reference numerals 5 and 26 denote optical shutters for controlling light transmitted through the split lenses 23 and 24, respectively. Reference numerals 27 and 28 denote images formed on the image sensor 22 by the split lenses 23 and 24, respectively.
Reference numeral 9 denotes a high-resolution signal conversion circuit that converts a video signal output from the image sensor 22 into a high-resolution video signal based on the formed images 27 and 28. FIG. 16 is a diagram showing time division of the imaging apparatus according to the tenth embodiment, and FIG.
FIG. 16B shows the output of the video signal processing circuit 13. FIG. 17 is a perspective view of the imaging apparatus according to the tenth embodiment.

Next, the operation will be described with reference to FIGS. As shown in FIG. 15, by arranging the split lenses 23 and 24 divided into two from one lens in the horizontal direction, the images 27 and 28 almost overlap, but they are slightly shifted in the horizontal direction to form an image. . The split lenses 23 and 2 are shifted so that the shift between the image 27 and the image 28 is shifted by 画素 pixel.
By arranging 4, the spatial sampling points in the horizontal direction obtained from the image sensor 22 can be increased.

When the transmission of light is sequentially switched by the optical shutters 25 and 26 in a time-division manner, the images 27 and 28 are formed while being sequentially switched in a time-division manner. The image pickup device 22 outputs the images 27 and 28 of the subject 9 by sequentially switching the images 27 and 28 in a time-division manner by the time-division control circuit 14, and the frequency thereof is arbitrarily standardized as shown in FIG. Output at twice the signal. The output of the image sensor 22 having the increased number of spatial sampling points in the horizontal direction is converted into an arbitrary standardized video signal by the high-resolution signal conversion circuit 29, so that the image sensor 22
A video signal having a higher horizontal resolution than a single unit can be obtained.

Embodiment 11 FIG. FIG. 18 is a perspective view of an imaging apparatus according to Embodiment 11 of the present invention, and shows an image 2 formed by the split lenses 23 and 24 of Embodiment 10 described above.
The split lenses 23 and 24 are separated from each other so that images 7 and 28 are formed on the image sensor 22 by being shifted vertically by 1/2 pixel in the vertical direction. As a result, a video signal with a high vertical resolution can be obtained by increasing the number of vertical spatial sampling points obtained from the image sensor 22.

Embodiment 12 FIG. FIG. 19 is a perspective view of an imaging apparatus according to Embodiment 12 of the present invention, and illustrates an image 27 formed by the split lenses 23 and 24 of Embodiment 9 described above.
The split lens 23 and the split lens 2 are arranged such that an image is formed on the image sensor 22 by being shifted in a diagonal direction by 画素 pixel.
4 are spaced apart. As a result, the image sensor 2
By increasing the number of spatial sampling points in both the horizontal and vertical directions obtained from Step 2, video signals with high horizontal and vertical resolution can be obtained.

Embodiment 13 FIG. FIG. 20 is a perspective view of an imaging apparatus as an example of Embodiment 13 of the present invention, in which the split lens of Embodiment 10 is divided into three. In the figure, reference numerals 30, 31, and 32 denote the first embodiment.
A three-divided lens 33, which is divided into three such that the object 2 is divided into three at a position shifted in the horizontal direction by 1/3 pixel on the image sensor 22;
Reference numerals 34 and 35 denote optical shutters for controlling light transmitted through the three-division lenses 30, 31, and 32, respectively. Reference numerals 36, 37, and 38 denote images formed on the image sensor 22 by the three-division lenses 30, 31, and 32, respectively. is there.

Next, the operation will be described with reference to FIG. As shown in FIG. 20, by arranging the three-divided lenses 30, 31 and 32 divided from one lens into three in the horizontal direction, the images 36, 37 and 38 almost overlap, but slightly in the horizontal direction. Image. This image 36,
By arranging the three-divided lenses, 30, 31, and 32 so that the shifts of 37 and 38 are each shifted by 1/3 pixel, the distance from the image pickup device 22 is reduced as compared with the case where the split lens divided into two from one lens is used. The number of obtained spatial sampling points in the horizontal direction can be increased.

By the way, in the example of FIG. 20, the number of lens divisions is three, but it is needless to say that the lens may be divided into three or more. Further, although the direction in which the divided lenses are shifted is set to the horizontal direction, it goes without saying that the split lenses may be shifted in the vertical direction or the oblique direction.

Embodiment 14 FIG. FIG. 21 is a perspective view of an imaging apparatus as an example of Embodiment 14 of the present invention, in which the split lens of Embodiment 10 is a multiple imaging lens that obtains images at a plurality of shifted positions. is there. In the figure,
Numeral 39 denotes a plurality of imaging lenses for forming images at a plurality of shifted positions. The areas 39a and 39b of the plurality of imaging lenses 39 form an image 27 on the image sensor 22 from the subject 9 similarly to the split lenses 23 and 24, respectively. , 28 are imaged.

Next, the operation will be described with reference to FIG. As shown in FIG. 21, the images 27 and 28 substantially overlap due to the regions 39 a and 39 b of the multiple imaging lens 39, but the images are formed with a shift of 画素 pixel in the horizontal direction. The number of horizontal spatial sampling points obtained from the image sensor 22 can be increased.

By the way, in the example of FIG. 21, the number of images formed by the plurality of image forming lenses 39 is set to 2, but it is needless to say that the image may be divided into three or more. Further, although the direction in which the images are shifted by the multiple imaging lenses 39 is set to the horizontal direction, it goes without saying that the images may be shifted in the vertical direction or the oblique direction.

Embodiment 15 FIG. FIG. 22 is a diagram showing the principle of an imaging apparatus as an example of the fifteenth embodiment of the present invention viewed from above. The imaging apparatus of the tenth embodiment includes an AF lens and a relay lens. In the figure, reference numeral 40 denotes an AF lens, and reference numeral 41 denotes a relay lens for further forming an image from an image obtained by the AF lens 40. As a result, by using the relay lens 41, the image formed by the AF lens 40 is divided into the image sensor 22 by the split lenses 23 and 24 and the optical shutters 25 and 26.
By imaging on top, the number of spatial sampling points can be increased.

By the way, in the example of FIG.
Is described on the image sensor 22. However, it goes without saying that the AF lens 40 may be a zoom lens. Needless to say, the AF lens 40 may be an interchangeable lens having a different configuration from the imaging device.

Embodiment 16 FIG. FIG. 23 is a principle diagram of an imaging device as an example of the sixteenth embodiment of the present invention as viewed from above, and includes a reflecting mirror in the tenth embodiment. In the figure, reference numeral 42 denotes a reflection mirror. As a result, by using the reflection mirror 42, the depth of the imaging device can be shortened.

[0080]

Since the present invention is configured as described above, it has the following effects.

Since the monochrome image sensor, lens, optical shutter, red transmission color filter, green transmission color filter, blue transmission color filter, time division control means, and color signal conversion means are used, At the same position on the image sensor, a red image, a green image, and a blue image can be formed in a time-division manner, so that a high-resolution color video signal can be obtained from the monochrome image sensor.

Further, since the lenses are divided into a green split lens and a red-blue split lens, which are horizontally separated from each other, the green image and the red-blue image are shifted by half a pixel in the left-right direction. Therefore, a color video signal having a higher horizontal resolution than that obtained by using a lens that is not divided can be obtained.

Also, since the split lens for green and the split lens for red and blue are arranged in the vertical direction, the green image and the red and blue image can be shifted vertically by 1/2 pixel to form an image. Therefore, it is possible to obtain a color video signal having a higher vertical resolution than when a lens that is not divided is used.

Further, since the split lens for green and the split lens for red and blue are arranged in the oblique direction, the green image and the red-blue image can be formed by shifting the oblique direction by 1/2 pixel in the oblique direction. For this reason, it is possible to obtain a color video signal having higher horizontal and vertical resolutions than when a lens that is not divided is used.

Also, since the lenses are divided into a green split lens, a red split lens and a blue split lens, and are arranged in a horizontal direction, the green image, the red image and the blue image are each reduced to 1/3. An image can be formed by shifting the image by a pixel in the horizontal direction, so that a color video signal having a higher horizontal resolution than that obtained by using an undivided lens can be obtained.

Further, since the split lens for green, the split lens for red, and the split lens for blue are arranged in the vertical direction, the green image, the red image, and the blue image are each separated by 1/3 pixel in the vertical direction. Therefore, it is possible to obtain a color video signal having a higher vertical resolution than when a lens which is not divided is used.

Further, since the split lens for green, the split lens for red, and the split lens for blue are arranged in the oblique direction, the green image, the red image and the blue image are each obliquely shifted by 1/3 pixel. It is possible to form an image with a shift, so that a color video signal with higher horizontal and vertical resolution can be obtained than when a lens that is not divided is used.

Further, since the time-division control means is a high-speed time-division control means for performing time-division by twice or more the number of images formed, the change of the green image, the red image and the blue image due to the movement of the subject can be leveled. Therefore, the color shift due to the movement of the subject can be reduced.

Also, an image pickup device, a split lens in which the lens is divided into two and horizontally separated, an optical shutter,
Since it is composed of the time-division control means and the signal conversion means, two images can be formed on the image sensor by shifting in the horizontal direction by 1/2 pixel in a time-division manner. A high-resolution video signal can be obtained.

Further, since the lens is divided into two and divided vertically and arranged separately, two images are formed on the image pickup device by being vertically shifted by 1/2 pixel in a time division manner. Therefore, a video signal having a higher vertical resolution than that of the imaging element alone can be obtained.

Also, since the lens is divided into two and divided lenses arranged diagonally apart from each other, two images can be formed on the image pickup element by shifting the pixel diagonally by 1/2 pixel in a time division manner. Therefore, it is possible to obtain a video signal having higher horizontal and vertical resolution than the imaging element alone.

Further, since the lens is divided into a plurality of parts and arranged separately, a plurality of images can be formed on the image sensor in a time-division manner at shifted positions, and therefore, an image having a higher resolution than the image sensor alone can be obtained. A signal can be obtained.

Further, since the lens is a plurality of imaging lenses for obtaining images at a plurality of shifted positions, a single lens forms a plurality of images on the image sensor at time-divisionally shifted positions. Therefore, it is possible to increase the number of spatial sampling points obtained from the image sensor without adjusting the pixel shift in the arrangement of the split lenses.

Further, since a relay lens is provided, an autofocus or zoom lens or an interchangeable lens mechanism can be provided, and therefore, an arbitrary image can be taken.

Further, since the reflection mirror is provided, the optical path between the lens and the image pickup device can be bent, so that the depth of the image pickup device can be shortened.

[Brief description of the drawings]

FIG. 1 is a principle diagram of a stereoscopic image display device according to a first embodiment of the present invention as viewed from above.

FIG. 2 is a diagram illustrating time division of the imaging device according to the first embodiment of the present invention;

FIG. 3 is a perspective view of the imaging device according to the first embodiment of the present invention;

FIG. 4 is a perspective view of an imaging device according to a second embodiment of the present invention.

FIG. 5 is a principle diagram of an imaging device according to a third embodiment of the present invention as viewed from above.

FIG. 6 is a perspective view of an imaging device according to a third embodiment of the present invention.

FIG. 7 is a perspective view of an imaging device according to a fourth embodiment of the present invention.

FIG. 8 is a perspective view of an imaging device according to a fifth embodiment of the present invention.

FIG. 9 is a principle diagram of an imaging device according to a sixth embodiment of the present invention as viewed from above.

FIG. 10 is a perspective view of an imaging device according to a sixth embodiment of the present invention.

FIG. 11 is a perspective view of an imaging device according to a seventh embodiment of the present invention.

FIG. 12 is a perspective view of an imaging device according to an eighth embodiment of the present invention.

FIG. 13 is a principle view of an imaging device as an example of Embodiment 9 of the present invention as viewed from above.

FIG. 14 is a diagram illustrating time division of an imaging device which is an example of Embodiment 9 of the present invention;

FIG. 15 is a principle diagram of an imaging device according to a tenth embodiment of the present invention as viewed from above.

FIG. 16 is a diagram showing time division of the imaging device according to the tenth embodiment of the present invention.

FIG. 17 is a perspective view of an imaging device according to a tenth embodiment of the present invention.

FIG. 18 is a perspective view of an imaging device according to an eleventh embodiment of the present invention.

FIG. 19 is a perspective view of an imaging device according to a twelfth embodiment of the present invention.

FIG. 20 is a perspective view of an imaging device which is an example of Embodiment 13 of the present invention.

FIG. 21 is a perspective view of an imaging device which is an example of Embodiment 14 of the present invention.

FIG. 22 is a diagram illustrating the principle of an imaging device as an example of the fifteenth embodiment of the present invention when viewed from above.

FIG. 23 is a principle diagram of an imaging device as an example of Embodiment 16 of the present invention as viewed from above.

FIG. 24 is a diagram illustrating the principle of a conventional imaging device viewed obliquely from above.

[Explanation of symbols]

1 monochrome image sensor, 2 lenses, 3, 4, 5 optical shutter, 6 red transmission color filter, 7 green transmission color filter, 8 blue transmission color filter, 9 subject, 1
0 red image, 11 green image, 12 blue image, 13 video processing circuit, 14 time division control circuit, 15 color signal conversion circuit, 16 green division lens, 17 red and blue division lens, 18 high resolution color signal conversion circuit, 19 red split lens, 20 blue split lens, 21 high-speed time-division circuit, 22 image sensor, 23, 24 split lens, 25,
26 optical shutter, 27, 28 images, 29 high resolution signal conversion circuit, 30, 31, 32 three-part shutter, three
3, 34, 35 optical shutters, 36, 37, 38 images,
39 multiple imaging lenses, 40 relay lenses, 41AF
Lens, 42 reflection mirror.

Claims (15)

[Claims] 1. A black-and-white image sensor, a lens for forming an image of a subject on the black-and-white image sensor, an optical shutter for controlling light transmitted through each of three divided areas of the lens surface, and a red light transmitted through the optical shutter. A color filter for transmitting red light, a color filter for transmitting green light, a color filter for transmitting blue light, a color filter for transmitting blue light, a time division control means for sequentially switching transmission areas of the optical shutter in a time division manner, and the monochrome image sensor. A black-and-white image signal output from the black-and-white image sensor by a red signal, a green image, and a blue image that are sequentially formed into a color image signal that is standardized. apparatus. 2. A split lens for green and a split lens for red and blue divided by a green light transmitting area and a red blue light transmitting area, and an image is formed by the green split lens on the monochrome image sensor. The green split lens and the red-blue split lens are formed such that a green image, a red image and a blue image formed by the red-blue split lens are formed with a shift of 1/2 pixel in the horizontal direction. A high-resolution color signal for converting a black-and-white video signal output from the black-and-white image sensor into an arbitrary standardized high-resolution color video signal by forming an image with shifted pixels; 2. The imaging device according to claim 1, wherein said imaging device is a conversion unit. 3. The split lens for green and the split lens for red and blue are formed such that a green image, a red image and a blue image are vertically shifted by 1/2 pixel on the monochrome image sensor. The imaging device according to claim 2, wherein the imaging device is arranged apart. 4. The split lens for green and the split lens for red and blue are formed such that a green image, a red image, and a blue image are formed on the monochrome image sensor so as to be shifted by 1/2 pixel in an oblique direction. The imaging device according to claim 2, wherein the imaging device is arranged apart. 5. The split lens for red and blue is a split lens for red and a split lens for blue divided by a red light transmitting area and a blue light transmitting area, and is connected by the green split lens on the black and white image sensor. The green image to be imaged, the red image formed by the red split lens, and the blue image formed by the blue split lens are each shifted in the horizontal direction by 1/3 pixel each. The imaging device according to claim 2, wherein the split lens for green, the split lens for red, and the split lens for blue are arranged separately. 6. The split lens for green, the split lens for red and the split lens for blue are shifted vertically by 1/3 pixel between the green image, the red image and the blue image on the monochrome image sensor. The image pickup apparatus according to claim 5, wherein the image pickup apparatus is arranged so as to form an image. 7. A green image, a red image and a blue image are displaced in the diagonal direction by 1/3 pixel on the monochrome image sensor, respectively. The image pickup apparatus according to claim 5, wherein the image pickup apparatus is arranged so as to form an image. 8. The imaging apparatus according to claim 1, wherein the time division control means is a high-speed time division control means for performing time division at twice or more the number of images. 9. A split lens, wherein an image sensor and a lens are divided into two parts, each of which is separated from each other so as to form two images on the image sensor at positions shifted by a half pixel in the horizontal direction. An optical shutter for controlling light transmitted through a split lens, a time-division control means for alternately switching the optical shutter in a time-division manner, and a video signal output from the image sensor by two images alternately formed on the image sensor An image pickup apparatus comprising a high-resolution signal conversion means for converting the image into a high-resolution video signal. 10. The apparatus according to claim 9, wherein the divided lenses are arranged apart from each other so as to form two images of the subject at positions shifted vertically by 1/2 pixel on the image sensor. Imaging device. 11. The apparatus according to claim 9, wherein the divided lenses are arranged apart from each other at a position shifted in a diagonal direction by half a pixel on the image sensor so as to form two images of the subject. Imaging device. 12. The divided lens is divided into a plurality of three or more lenses, each of which is divided into 1 / (plurality) on the image sensor.
The imaging apparatus according to any one of claims 9 to 11, wherein a plurality of divided lenses are arranged so as to form a plurality of images of the subject at positions shifted by pixels. 13. A split lens for splitting a lens and forming an image of a subject at a shifted position is a multiple imaging lens for forming an image at a plurality of shifted positions.
The imaging device according to claim 12. 14. The image pickup apparatus according to claim 1, wherein a relay lens is provided so that an auto focus, a zoom lens, or an interchangeable lens mechanism can be provided. apparatus. 15. The imaging apparatus according to claim 1, further comprising a reflection mirror between said optical shutter and said monochrome imaging plate or said imaging plate.