JP2011085876A - Device for simultaneous photography of wide and narrow areas - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a device that photographs and records wide and narrow areas by performing wide area photography and narrow area photography in an extremely short time and performs infrared light photography simultaneously with visible light photography with a small time lag to an extreme, and to provide a device that is miniaturized in volume and light in weight, thereby makes it possible to perform operation by being held with hands in aerial photography or the like. <P>SOLUTION: A beam splitter is arranged in optical paths of a wide area photographic lens and a narrow area photographic lens, to guide a light beam to an infrared light image sensor and a visible light image sensor. A shutter is arranged between the beam splitter and each photographic optical system. As the shutter turns, the wide area photography and the narrow area photography are alternately performed in the extremely short time, and photographing and recording of the wide and narrow areas are performed. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a device capable of simultaneously performing wide-area photographing with a single photographing device and narrow-area photographing at a substantially central portion of the wide-area photographing.

  In conventional aerial photography equipment, two types of equipment were used properly to perform wide and narrow photography. For this reason, it takes time to change the device, and the distance from the first object to be photographed changes. Therefore, when the next photographing is performed, the time axis changes and the distance changes. These changes inevitably cause a change in the subject as well as the shooting position.

In order to solve the above problem, an adapter or the like was used so that two types of equipment could be operated simultaneously, but the equipment volume increased and the weight increased, resulting in poor operability. Moreover, in order to photograph visible light and infrared light simultaneously, additional equipment is required.

  Conventionally, as described above, in order to perform wide and narrow range shooting, a plurality of devices are used properly or a plurality of devices are used in combination. For this reason, the arrangement and operability of the equipment were hindered in a restricted volume space. When a plurality of equipments are used in combination, the volume of the equipment increases and the weight inevitably increases.

  The present invention provides a device that has been reduced in size and weight so that wide- and narrow-area simultaneous photographing and visible light and infrared light simultaneous photographing can be performed with a single piece of equipment and simple operation. In addition, the area ratio of the wide area shooting can be easily converted with respect to the narrow area.

  In order to achieve the above-mentioned object, the present invention provides a narrow area photographing optical system and a wide area photographing optical system arranged in parallel, and a mirror for refracting a light beam in the optical path of the narrow area photographing optical system or A prism is disposed, the refracted light beam is guided to a beam splitter, and is disposed so as to form an image on an image pickup device disposed in the vicinity of the beam splitter. The light beam of the wide-area photographing optical system is guided as it is to the beam splitter and is arranged so as to form an image on the image sensor.

  In order to switch the imaging element imaging of the wide and narrow optical system, a shutter mechanism for blocking the light beam is arranged between both optical systems and the beam splitter. The shutter mechanism blocks the light beam of the wide-area optical system when it passes through the light beam of the narrow-area optical system. When the shutter is rotated, the opening of the shutter blocks the light beam of the narrow optical system so that the light beam of the wide optical system can pass through. While the shutter is rotating, while the light beams of both optical systems are blocked, the data of the image sensor when the shutter is open is transferred and stored in the storage element.

  The imaging device is arranged in the vicinity of the beam splitter, and is arranged and configured so that one side divided by the beam splitter forms an image on the visible light imaging device and the other on the infrared light imaging device. In addition, by configuring the wide-area photographing optical system to be replaceable, it is possible to change the ratio of wide and narrow areas as necessary. When a zoom optical system is used for a wide-area photographing optical system, it is possible to convert the ratio of wide and narrow areas more easily.

  By adopting the configuration described above, it is possible to achieve a reduction in size and weight, and simultaneously perform visible light imaging and infrared light imaging, and wide and narrow area imaging can be instantaneously performed. Such information is useful for detailed analysis of a narrow area in the center of a wide area and grasp analysis of the surrounding situation. It can also be used to grasp the reverse situation. They are useful for academic use.

  The embodiment of the present invention will be described with reference to the first example shown in FIGS. 1 to 3 and other examples shown in FIGS. These embodiments are provided with two types of optical system for wide area photographing and optical system for narrow area photographing. A prism or mirror for refracting the light beam is disposed on the image forming surface side of the narrow-area optical system, and the refracted light beam is guided to the beam splitter. The wide area photographing optical system guides the light beam to the beam splitter without refracting the light beam.

  The optical paths of both optical systems are divided by a beam splitter, and the beam splitter and the image sensor are arranged and formed so as to form an image on two image sensors. One of the image sensors is an image sensor for visible light, and the other image sensor is an image sensor for infrared light. A filter that transmits only infrared light is arranged on the front surface of the image sensor for infrared light. Has been established. A filter that cuts harmful light and transmits only visible light is disposed on the front surface of the visible light imaging device.

  There is a difference between the best imaging position of visible light and the best imaging position of infrared light due to the difference in wavelength. In order to correct the deviation, the wavelength deviation is corrected and attached to the beam splitter. By doing so, it becomes possible to simultaneously capture a visible light image and an infrared light image without focus correction. In the description, visible light and infrared light are described, but a combination of elements having other functions may be used. Or even if it is a single element use, it is not a problem at all.

  The shutter has a function for guiding only one of the wide-area imaging optical system and the narrow-area imaging optical system to the beam splitter, and a function of blocking the optical path for taking in information of the image sensor.

  A lens mount for mounting the wide-area optical system is provided on the front side of the beam splitter subject side of the wide-area optical system. The mount has an advantage that various interchangeable lenses that are commercially available can be used by using a bayonet mount of a single-lens reflex camera. This makes it possible to freely select a wide and narrow shooting ratio. In particular, when a zoom lens is used, ratio conversion can be performed quickly without changing the lens. Regarding the position of the mount, it is necessary to set the distance from the imaging plane of the image sensor depending on the type of interchangeable lens to be used.

The first embodiment will be specifically described. FIG. 1 shows a state in which the narrow-area optical system forms an image on the image sensor. Reference numeral 1 denotes an objective lens of the narrow-area photographing optical system. The primary mirror 3 reflects light incident from the objective lens 1 and guides the light beam to the secondary mirror 2. The light beam reflected by the secondary mirror 2 is guided from the opening provided at the central portion of the main mirror 3 to the prism 4 or the mirror provided behind the main mirror 3, and the light beam is refracted by 90 degrees. The refracted light beam enters the second group optical system 5 and is guided to the beam splitter 11. The light beam is divided into two by the beam splitter 11 and the reflected light beam passes through the infrared light cut filter 15 and is guided to the visible light imaging device 14 to form a visible light image.
The other light beam split by the beam splitter 11 passes through the beam splitter 11, passes through the visible light cut filter 12, and is guided to the infrared light imaging device 13 to form an infrared light image. The ND filter 6 provided in the narrow-range shooting optical system is for controlling the amount of light, and is useful for matching the light amount of the wide-range shooting optical system. In some cases, it may not be used.

A shutter 16 disposed so as to include the beam splitter 11, the visible light image sensor 14, and the infrared light image sensor 13 has a drum cylindrical shape, and on its side surface, an optical system for wide and narrow area photographing. An opening for transmitting or blocking the light beam is provided. In FIG. 1, the light beam of the narrow-range photographing optical system is guided to the image sensor. The drum-shaped shutter 16 is rotated by a drive source such as a motor (not shown).
As for the form of the shutter, there is no particular concern about the drum cylinder shape, and it can be configured by a shutter described later.

  When the shutter 16 is rotated to the state shown in FIG. 2, the optical path of the wide and narrow area optical system is blocked, and the information immediately before the narrow area optical system forms an image on each image sensor is held. ing. The information can be transferred to a storage element or the like by transfer software or the like (not shown), and can also be transferred and displayed on a display mechanism or the like (not shown).

When the shutter 16 is further rotated, the state shown in FIG. 3 is obtained. This state shows a state where the wide-area optical system forms an image on the image sensor. The light incident on the objective lens 7 of the wide-area optical system passes through the lenses 7 and 8 and the lens 10 and reaches the beam splitter 11, and the light beam is divided into two by the beam splitter 11.
The light that travels straight through the beam splitter 11 passes through the infrared light cut filter 15 described above, and is guided to the visible light imaging device 14 to form a visible light image. The refracted light passes through the visible light cut filter 12 described above and is guided to the infrared light image sensor 13 to form an infrared light image. A diaphragm 9 provided between the wide-area optical systems is for controlling the amount of light, and is useful for matching the light amount of the optical system for narrow-area photography.

  When the shutter 16 is further rotated, the optical path of the wide and narrow area optical system is blocked, and the information immediately before the wide area optical system is focused on each image sensor is held. The information can be transferred to a storage element or the like by transfer software or the like (not shown), and can also be transferred and displayed on a display mechanism or the like (not shown).

  The lens mounting mount 17 for the wide-area optical system lens provided between the wide-area optical system and the beam splitter 11 is useful for exchanging the wide-area optical system lens, and is capable of converting the ratio of the wide and narrow imaging range. Have

  The focus setting of the optical system for wide- and narrow-area photography may be performed manually, but by analyzing the information imaged on the visible light image sensor, an automatic focusing mechanism (not shown) (normal autofocus) ) Can be used for focusing.

FIG. 4 shows another embodiment. This will be specifically described. A telephoto lens system 18 using a normal refractive system instead of the reflective telephoto system as described in the first embodiment (the lens 18a, the lens 18b, the aperture 18c, and the lens 18d shown in FIG. 4) Is an example of the configuration. Behind the telephoto lens system 18, light is refracted by a polo mirror system (configuration of mirror A 19, mirror B 20, and mirror C 21) to guide the light to the beam splitter 11.
The configuration after the beam splitter 11 is the same as that described in the first embodiment.
The shutter is composed of a disk-shaped plate whose axis of rotation is parallel to the reflecting surface of the beam splitter 11, and the disk-shaped shutter blade 22 has a fan-shaped opening. The aperture has a function of alternately transmitting and blocking the light rays of the wide and narrow area optical system.
As described in the first embodiment, when both of the light beams of the narrow-area photographing optical system are blocked, the imaging information immediately before the blocking is stored and held, and the information is not shown in the transfer software or the like Thus, the data can be transferred to a storage element or the like, and transferred to a display mechanism (not shown) or the like for display.

FIG. 5 is a modified embodiment of FIG. This will be specifically described. The optical system for narrow area photography is the same as that of FIG. 4, but uses a prism having a plurality of reflecting surfaces instead of the rear polo mirror system. It is also effective to use the roof-type pentaprism 23 so that the prism is not horizontally reversed with respect to the image formed by the wide-area photographing optical system.
The shutter is a modification of FIG. 4, and is a compact (Umbrella-shaped shutter blade 24, see FIG. 5) in which the disk shape of FIG. 4 is configured in an umbrella shape. Since the configuration of the image sensor and the like after the beam splitter has been described in the first embodiment, it is omitted here.

  For simplification of the optical system, even if wide and narrow range images are inverted, they can be matched by image processing. Further, the visible light image and the infrared light image are reversed left and right, but are matched by image processing technology.

  It is a conceptual diagram which shows arrangement | positioning of the optical system component of a wide and narrow area | region simultaneous imaging device, and arrangement | positioning of an image pick-up element, and a shutter with the form of 1st Example of this invention. It is the figure which showed the state in which the narrow region optical system image-formed on the image sensor.   It is a conceptual diagram which shows the state which the shutter rotates from FIG. 1, the optical path of a wide and narrow area optical system is interrupted | blocked, and the information of an image pick-up element is transferred to a memory | storage element.   FIG. 3 is a diagram illustrating a state in which the shutter is further rotated from FIG. 2 and a wide-area optical system is focused on an image sensor.   In other embodiment of this invention, it is the conceptual diagram comprised by the polo mirror system in the optical path of a narrow region optical system. Moreover, it is a conceptual diagram which shows the arrangement | positioning which comprised the shutter in disk shape.   It is the conceptual diagram which has arrange | positioned and comprised the pentaprism in the optical path of a narrow region optical system in other embodiment of this invention. Also, it is a conceptual diagram showing an arrangement in which the shutter is umbrella-shaped and includes the beam splitter.

DESCRIPTION OF SYMBOLS 1 Objective lens 2 Submirror 3 Primary mirror 4 Prism 5 Two group optical system 6 ND filter 7 Lens 8 Lens 9 Aperture 10 Lens 11 Beam splitter 12 Visible light cut filter 13 Infrared image sensor 14 Visible light image sensor 15 Infrared light cut filter 16 Shutter 17 Lens mounting mount 18 Telephoto lens system 18a Lens 18b Lens 18c Aperture 18d Lens 19 Mirror A
20 Mirror B
21 Mirror C
22 Disc-shaped shutter blade 23 Roof-type pentaprism 24 Umbrella-shaped shutter blade

Claims (6)

  A mirror or prism for refracting the optical path is arranged in the narrow-field imaging optical system, and after refracting the optical path, the optical path is guided to the beam splitter, and the image is formed on the image sensor via the beam splitter. The wide area photographing optical system is arranged substantially parallel to the optical axis of the narrow area photographing optical system, and the optical path of the wide area photographing optical system is guided to the beam splitter so as to form an image on the image sensor. A wide- and narrow-area simultaneous photographing device characterized in that a shutter mechanism for alternately blocking light of each optical system is arranged on each photographing optical system side of the beam splitter.   The shutter disposed between each imaging optical system and the beam splitter is characterized in that an opening is provided in the side wall of the drum cylinder that rotates around the outer circumference of the beam splitter and the imaging element. The wide and narrow area simultaneous photographing apparatus according to claim 1, wherein the photographing is performed by alternately switching between the narrow area photographing optical system and the wide area photographing optical system.   The imaging device is arranged in the vicinity of the beam splitter, and one of the lines divided by the beam splitter is configured to be guided to the visible light imaging device, and the other is guided to the imaging device having other functions. A wide and narrow simultaneous photographing apparatus according to claim 1 and claim 2.   2. The wide and narrow area simultaneous photographing apparatus according to claim 1, wherein the narrow area photographing optical system is constituted by a reflective telephoto optical system in order to reduce the size and weight of the device.   The wide-area and narrow-area simultaneous photographing apparatus according to claim 1, wherein the wide-area photographing optical system includes a wide-area photographing optical system lens mount arranged on the apparatus so that the wide-area photographing optical system is detachable from the apparatus.   The shutter disposed between each photographing optical system and the beam splitter is configured by a shutter blade disk-shaped plate or an umbrella-shaped disk, and the disk is provided with a fan-shaped opening. The blades rotate in one direction, have a wide opening, and are configured to transmit information of the image sensor to the memory element when the narrow optical path is interrupted. Shooting device.

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