JPH02100586A - Multiplate type camera - Google Patents

Abstract

PURPOSE:To expand a visual field or to improve resolution even through the use of the same interchangeable lens as traditional one and by the same magnification by performing prescribed image shift for an image which is picked up by the lens of high selectively such as the interchangeable lens by using a prism group such as the cube beam splitter, etc., of fundamental optical system. CONSTITUTION:In optical system to pick up the image of two sections continuous fundamentally by one lens system without separating them at all, the image of a spatial primary image S1 to be image formed by the lens of an image pickup lens L1 is separated into two parts by the beam splitter BS, and enter a No.1 and a No.2 image sensors respectively. At that time, a mirror M adapts the directivity of the image, and is enhanced in its general applicability by using the leans L0 of high selectivity such as the interchangeable lens, a zoom lens, a microscope, etc., in the case where it is used for reducing a large, picture or expanding a small picture. By making the image S0 of a sample surface S0 magnified valiably by this L0 coincide with the focus plane spatial primary image S1 or L1, reading magnifying power can be applied to a wide range.

Description

[Detailed description of the invention] [Industrial application field] The present invention relates to a multi-disc camera.

[Conventional technology]

Conventional cameras for photoelectric conversion for industrial use and photography have small element sizes of 2/3", //2" and /". In particular, CCD cameras are easy to use, but the number of bits in the frame is small. However, if the field of view was widened, the resolution per bit would be insufficient, and if the resolution was sufficient, the field of view would be insufficient.

The following three methods have been proposed to solve these problems, but none of them have been satisfactory.

a. Method of arranging cameras This method creates a blind spot between the cameras when the magnification is less than about OJ times in a reduced system and 7 times or more in an enlarged system. In particular, blind spots in the center of the image cause difficult problems in measurements and external dimension measurements.

b. In the case of a three-plate color CCD camera, the entire screen is divided into R, G, and B by wavelength division using a dichroic filter without shifting the optical path.

Therefore, wide-field high resolution is limited by the size of the element.

A lens assembly in which the C0 image receiving lens is directly divided by a beam splitter can only be used with a fixed focal point because the lens assembly must be changed when the working distance and image distance at the focal length change and the optical magnification changes. In this case, the number of shedding centers is equal to the number of elements.

[Problem to be solved by the invention]

a. The first object of this invention is to use a plurality of image sensors or tubes, and to use a single image receiving lens to enlarge the field of view or to reduce the field of view with the same magnification, regardless of whether it is an enlarging optical system or a reducing optical system. If it's a number, it's about creating a camera that increases resolution.

b. The second object of this invention is to avoid creating blind spots between multiple sheets.

C9 The third purpose of this invention is to focus on one thing.

d. The first point to be noted in this invention is to align the direction of the image to the correct surface when a plurality of surfaces are integrated by center wiping.

C1 The second point to note is that the image must be divided into equal parts.

f, The third point to note is that due to the combination of prism groups including the beam splitter, the combined image
No distortion in Y and θ directions.

[Means to solve the problem]

a. This invention passes the spatial/next image of one imaging lens through a common lens, shifts the image corresponding to the object surface via a prism system including a cube beam splitter, and installs an image sensor, etc. on each of these images. Attach the photodetector of
This makes it possible to read as much information as the number of cameras, which corresponds to the number of elements, in the time equivalent to seven cameras.

b. By combining a prism group including a cube beam splitter, the scanning direction of each divided screen can be matched, and the camera parts can be miniaturized as a whole without interfering with each other in terms of mechanical dimensions.

The C0 resolution was secured to be approximately multiple times the published MTF of the device.

d, shading was only in the center of the image set.

e. Blind spots were eliminated by slightly overlapping the joints of multiple images through the image shift design of the prism group including the cube beam splitter.

f. Image signals from each element are displayed on a single monitor using a center wipe, a glass scale is inserted into the common lens, and final adjustments using this image can minimize image distortion in X, Y, and θ. Ta.

With this shift design and this adjustment method, we were able to align the correct plane of the image and divide it into equal parts.

g. By using a C mount or an interchangeable lens mount to attach the common imaging lens, various types of C mount or interchangeable lenses can be attached, and both enlargement and reduction systems are possible. It was stable.

〔Example〕

In principle, the present invention can use any number of light-receiving elements, but there are optical constraints due to the increase in the number of cube beam splitters used, and in reality, a λ plate type camera using two elements (first Figure) b,
Direct≠plate type cameras in which two of the above two series are arranged horizontally/in rows (Fig. 2),≠plate type cameras arranged in a C0 field (Fig. 3)d, and modified sheet pile type cameras (Fig. 4L) are in practical use. It is true.

Specific embodiments of the present invention will be described in detail below with reference to the drawings.

(1) Two-panel camera; (See Figure 1 (1)) Basic optical system; Basically, it is an optical system that captures images with one lens system without any increase in two continuous sections, using a lens of % Ll. The spatial/order image SlO image formed is divided into two by a beam splitter-BS, each NO.

/ Enter image sensor 1 NO, 2 image sensor.

At this time, the mirror M is used to adjust the directionality of the image.

Each image sensor is installed not at the center of the optical axis but at a shift corresponding to the reading screen.

At this time, since both screens need to overlap slightly, one image sensor is X, Y, and Z.

and skew is required.

Variable magnification optical system: This basic optical system alone is inconvenient because there are various restrictions when reducing a large screen or enlarging a small screen.
High selectivity such as interchangeable lenses, zoom lenses, and microscope lenses. The reading range (magnification) can be used over a wide range by adjusting the focal plane space to the 7th-order image S1.

Electrical system: (See Figure 1 (2)) The signals received by the image sensors No. 1, No. 2, and No. 2 are sent to the amplifier circuit and C
The image is converted into a video signal via the RT controller, and either sent to two separate monitors or combined using a center wipe.
The images are input to a standalone monitor or processed by an image processing device. At this time, the characteristics of the video signals of the two cameras are precisely matched.

This example was performed using a CCD, but MOS, tube, and line sensors can also be used.

(2) Series ≠ plate type camera; (See Figure 2 (+1)
Continuous series ≠ It is a method of reading with two lens systems without separating the divisions at all, but this basically uses roof-shaped common mirrors as back-to-back objects, and the Ll lens system reads the field of view division /1.2, The lens system L2 is a completely modified two-panel camera that shares field of view sections 3 and 4L, respectively.

The optical path (travel) R is as follows.

(Left below) Each camera is attached by shifting it to correspond to each screen using M, BS, and BS2. The electrical system shown in Figure 2 (2) is basically the same as the λ plate type.

S: Spatial 7th-order image frame M: Roof-shaped mirror L, 0: Field lens plus interchangeable lens (
This lens is a 3-event rule lens only) L, = L, : Spatial/next image imaging lens B51 = B
S2: Beam splitter M1 = M2: Main 2: (Orienting the sample) Note: In this example, due to the size of the image sensor, if a 33 mm lens is not used, the image fl will be chipped.

(3) Tomoe-shaped sheet pile camera; (see Figure 3 (1))
Configuration of basic optical system: Spatial/next image pickup lens L, and B51-BS3, total 3
A cube beam splitter is used, and ≠ image sensors always pass through the moss. Two right-angle prisms P1. P
2 was used. In order to equalize the optical path length to each image sensor, a moss glass space f-S P1SP2 is added.
It was used. (Optional) The optical path (travel) order is shown below.

Basic optical system Variable magnification optical system Composition of variable magnification optical system; In order to reduce a large screen or enlarge a small screen, the basic optical system alone is too versatile, so highly selective lenses such as interchangeable lenses are used. By doing so, it is possible to cope with changes in magnification.

Sample S magnified at L. By aligning the spatial/next image So' with the focus S1 of Ll, the reading range (magnification)
can be used in a wide area.

When using a C-mount lens, the back focus is /7J2
It is determined that the 82' image will be created there, and the interchangeable lens will be 4' jttan ~ ≠ Otsu tone depending on the manufacturer.
Since an SO2 image is always produced, there is no need to change the setting position of the basic optical system even if the magnification changes.

Electrical system; (See Figure 3 (2)) NO, / ~N0.4' (D
The signal received by the (CICD) is converted into a video signal through an amplifier circuit and a CRT controller circuit as shown in Figure 3 (2), and then sent to a monitor or camera center wipe.
The image is either displayed on a standalone monitor or processed by an image processing device with frame memory.

Although a CCD was used as the imaging device in this example, it is also possible to use an NO8, tube, or line sensor.

O I BS, ~B53 P, , P2 SP, , Sr2 [Effects of the Invention] As detailed above, the present invention converts images captured with highly selective lenses such as interchangeable lenses, zoom lenses, and microscopes into basic optical systems. By performing a predetermined image shift using a group of prisms such as a cube beam splitter in the system, for example, in a circular≠plate type, it is possible to obtain a field of view that is approximately 2 times the total ≠ times with the same magnification, using the same interchangeable lenses as conventional lenses both horizontally and vertically. was completed.

For example, in IC image processing inspection, the field of view can be increased by ≠ times with the same magnification, and the same NTSC signal processing is required, so simply adding an inexpensive image processing device can reduce the inspection time.
/4t can be saved.0:Interchangeable lens:Imaging lens:Cube beam splitterTwo prisms (sample facing)Niglas spacerIf you put the image composition part in the frame memory and use digital image processing, etc., it will not be blurred. With a monitor, you can obtain an image that is close to the human viewing angle/100. Note that the present invention is applicable not only to enlargement and reduction systems, but also to transmissive illumination as an illumination system.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention, and FIG. 1 (1) is an explanatory diagram of the optical path of a two-panel camera, FIG. 1 (2) is an explanatory block diagram for a double-panel camera, and FIG. Figure 3 (2) is an explanatory block diagram for displaying the same as above, Figure (1) is a split diagram of a two-panel screen, Figure (
2) is a split diagram of a serial ≠ board type screen, and Figure (3) is a tomoe type ≠
Divided diagram of board screen, Figure (4) (a) middle) is deformed.
Divided diagram of the plate type screen, (c) in Figure (4) is a divided diagram of the modified λ plate type screen. \” Minamoto no Mikoto L ■Figure 3 (2) Figure 4 (4) (A) (4) (B) (4) (C) Shizuku

Claims (1)

[Claims] 1. Capturing a spatial primary image of an imaging lens with a common lens;
By passing this lens image through a group of prisms including a cube beam splitter, the screen is divided and shifted according to the subject screen, and each image is focused on the shifted black and white or color image sensor. A multi-disc camera with variable magnification and multiple image sensors capable of both enlarging and reducing optical systems. 2. The optical path is shifted so that the received image becomes a square depending on how the image sensors are arranged, and four area type black and white or color image sensors are attached to the front of the optical path.It is a 4-plate type with variable magnification and a set of lenses. The multi-disc camera according to claim 1. 3. Due to the arrangement of the image sensors, images on the image receiving surface are arranged in series 4
2. The multi-disc camera according to claim 1, which is a four-panel camera with variable magnification and a set of lenses, in which the optical path is shifted so that the optical path becomes one, and four black-and-white or color image sensors are attached to the front of the optical path. 4. A two-plate type lens with variable magnification, which shifts the optical path so that the number of received images becomes two depending on how the image sensors are arranged, and has a set of lenses with a black and white or color image sensor attached at the end thereof. Multi-disc camera. 5. The received image is distorted depending on how the image sensors are arranged 4.
Claim 1: A 4-plate or 2-plate type with variable magnification, which has a set of lenses that shifts the optical path so that the optical path becomes one or two, and a black and white or color image sensor is attached to the tip of the set of lenses.
The multi-disc camera described. 6. A multi-disc camera capable of variable magnification and having a lens assembly to which a line-type CCD element or MOS element is attached in place of the image sensor according to claims 1 to 5. 7. A multi-disc camera capable of variable magnification, in which a black-and-white, color, infrared, or X-ray imaging tube is attached in place of the image sensor according to claims 1 to 5. 8. A multi-panel camera in which an integrated camera or a separate camera is attached in place of the image sensor according to claims 1 to 5.