DE102018122475A1 - Adjustable lens hood module for a cinematographic camera system - Google Patents

Abstract

A camera system (100) comprises a camera unit (10) for capturing still and / or moving images of an object, the camera system (100) containing the following components, which are arranged along an optical axis (A) of the camera system (100): one Image sensor (20); a lens (30), the lens (30) being designed to supply light from the surroundings surrounding the object to a sensor surface (21) of the image sensor (20); a lens hood module (50) arranged in front of the lens (30), in the lens (30) or between the lens (30) and the image sensor (20), the lens hood module (50) one or has a plurality of lens hoods (501, 502, 503) and a lens hood module opening (500) defined by the one or more lens hoods (501, 502, 503), and the lens hood module opening (500) can be adjusted manually and / or by motor with respect to at least one of the following parameters is: location, size and geometric shape.

Description

TECHNICAL AREA

The present invention relates to embodiments of a camera system, in particular a cinematographic camera system, which has an adjustable lens hood module.

BACKGROUND

From the publication WO 2006/012859 A2 For example, a cinematographic camera system is known.

Such a camera system comprises a camera unit for capturing still and / or moving images of an object, the camera unit having optics with at least one lens and an image sensor. The light is captured via the lens and fed to the image sensor. The image sensor is connected to an image signal evaluation unit, which reads out the image sensor and, as a result, produces digital data which are indicative of the still or moving images.

In general, it is practically unavoidable that light from reflection, scattering and diffraction processes strikes the image sensor in addition to light which contains the desired object information. The latter can sometimes be described as false light.

In the present case, the term “false light” generally refers to undesired light for the respective image design, which light is registered by the image sensor.

When taking pictures with a camera, a lens hood is sometimes used to reduce false light, although the use of lens hoods is rare in cinematographic camera systems, apart from compendia and on isolated lenses.

A lens hood reduces e.g. False light that arises, for example, from diffuse transmission, regular and diffuse reflection or diffraction. The aim is usually to only allow the false light to reach the sensor after as many “absorbing reflections” as possible, or to keep it completely away from it by targeted reflection.

False light includes, for example, regular or diffusely reflected light, which arises from single or multiple reflections on the image sensor, on lenses, filters or their respective edges, diaphragms or other components inside the camera unit or the lens, as well as on filters in front of the lens. Depending on the structure of the optical system, the false light can be distributed over surface sections of the image sensor and therefore, for example, reduce the contrast, particularly in the case of darker image parts. False light can also result from single or multiple reflections between lenses, filters and the image sensor, or from damage or restrictions in the geometric design of components such as optical frames, which result in light leakage or increased light scattering, or due to contamination or due to interfering light coupled in another way.

False light is particularly disturbing if its illuminance, i.e. the radiation flow per effective receiver surface is increased by single or multiple reflections on the sensor and, if necessary, the spectral power distribution is also modified. The latter has the consequence that the color of the false light changes, which can lead to increased visibility.

Usually, as little disturbing false light as possible should get to the image sensor. This is particularly difficult to accomplish when a highly transmissive lens with a large numerical aperture and a large object field angle is used. Depending on the sensor dynamics, the sensor sensitivity as well as the local and temporal resolution, etc., as sensors become smaller, the ratio of areas irradiated with false light with high irradiance to the sensor size can become less favorable compared to large sensors. However, this can also depend on the design of the upstream optical system.

Known measures for reducing the false light consist in the design of a suitable geometry, its surface structuring and coating for the interior of the camera unit (for example camera housing surfaces, lens hoods, electronic surfaces and the like), as well as the optics surfaces and volumes and the sensor surfaces and volumes (e.g. Microlens array, color filter (e.g. Bayer filter), semiconductor surfaces and volumes (pixel photosite), fill level (readout electronics within the respective pixel), etc.).

Another option for damping the optical power in the propagation path between optical groups is to use a neutral density filter between them, for example between the sensor and the lens. However, it should be noted here that the optical power of the light is also attenuated with the desired imaging information, and that is proportional to the false light attenuation in the inverse propagation direction.

The extensive and targeted use of lens hoods is common, for example in astronomical optics systems; whether on earth, in the air or in space. Very high image dynamics are achieved there by long-term recordings and detectors designed thereon, often with over 16 apertures.

In some previously known camera systems, the proportion of scattered light is partly high due to the non-optimized geometry of the optomechanics and the absence of internal lens hoods and depends specifically on the respective lenses, lens mounts, filter holders, sensors, housings, etc. In current cinematographic camera systems, the image dynamics are sometimes very high with sometimes more than 14 f-stops and is further increased, for example to more than 16 f-stops. Image standards are currently being developed and introduced which are based on more than 19 aperture image dynamics.

There are some cinematographic lenses that include a lens hood, e.g. the ARRI Anamorphic Ultra Wide Zoom 19-36 / T4.2, which is typically arranged on the light entry side, as described in the document "ARRI_Anamorphic_Ultra_Wide_Zoom_AUWZ _-_ Product_Leaflet_2016.pdf" with the Ident.-No .: 80.0012974. This document is available for download from the applicant's homepage.

A compendium is often installed on the light entry side of the lens, the central function of which is to reduce false light in the form of stray light. An example of such a compendium, which is also referred to as a “matte box”, is known from the user manual for the compendium of type SMB-1 / SMB-2, which is sold by the present applicant, the user manual being called “ SMB-1_SMB-2_User_Manual.pdf ”is also available for download on the applicant's homepage.

Compendia can include a matte box filter (e.g. neutral density (ND) filter, polarizing filter, soft focus, etc.), but also the eponymous "mattes", which represent field diaphragms. Field diaphragms can be regarded as a special form of lens hoods because they deliberately restrict the image field, for example to a desired recording format as a subaperture to the full sensor area. Scattered light can be avoided by reducing unwanted surface lighting. Certain lens hoods do not change the field of view, but reduce stray light through targeted absorbing multiple reflections and the restriction of stray light propagation paths.

For example, due to the high sensor dynamics and sensitivity of the image sensor, Stray light visible in scenes with high contrast. Even if the scene itself is dark, a light source outside the object field can lead to considerable stray light and a significant reduction in image dynamics (example: night scene with street lamp outside the object field). In addition, the stray light from some optomechanics in camera systems is typically structured, which, in addition to the loss of dynamics, makes an uneasy impression.

Compendia in front of lenses or lens hoods on the entrance side, however, only limit the incident light.

This is important and necessary, but may not be sufficient because stray light can also occur inside the lens and / or inside the camera.

DESCRIPTION

According to one embodiment, a camera system comprises a camera unit for capturing still and / or moving images of an object, the camera system containing the following components, which are arranged along an optical axis of the camera system: an image sensor; a lens, the lens being designed to supply light from the surroundings surrounding the object to a sensor surface of the image sensor; a lens hood module arranged in relation to the optical axis either in front of the lens, in the lens or between the lens and the image sensor, the lens hood module defining one or more lens hoods and one defined by the one or more lens hoods Has a lens hood module opening, and the lens hood module opening can be adjusted manually and / or by motor with respect to at least one of the following parameters: position, magnitude and geometric shape.

According to a further embodiment, a lens for a camera system is proposed. The camera system comprises a camera unit for capturing still and / or moving images of an object. The lens is designed to supply light from the surroundings of the object to a sensor surface of an image sensor of the camera unit. The lens comprises a lens hood module, the lens hood module having one or more lens hoods and a lens hood opening defined by the one or more lens hoods, and the lens hood module opening being manually and / or mechanically adjustable with respect to at least one of the following parameters: position, magnitude and geometric shape .

According to a further embodiment, a camera unit for a camera system for capturing still and / or moving images of an object is proposed. A lens of the camera system is designed to supply light from the environment surrounding the object to a sensor surface of an image sensor of the camera unit. The camera unit comprises a lens hood module, the lens hood module having one or more lens hoods and a lens hood module opening defined by the one or more lens hoods, and the lens hood module opening being manually and / or motorically adjustable with respect to at least one of the following parameters: position, magnitude and geometric shape .

According to yet another embodiment, a lens mount for a camera system for capturing still and / or moving images of an object is proposed. The camera system comprises a lens and a camera unit. The lens mount is designed to be coupled between the lens and the camera unit. The lens of the camera system is designed to supply light from the environment surrounding the object to a sensor surface of an image sensor of the camera unit. The lens mount comprises a lens hood module, the lens hood module having one or more lens hoods and a lens hood module opening defined by the one or more lens hoods, and the lens hood module opening being manually and / or motorically adjustable with respect to at least one of the following parameters: position, magnitude and geometric shape .

According to yet another embodiment, a compendium for a camera system for capturing still and / or moving images of an object is proposed. The camera system comprises a lens and a camera unit. The compendium is designed to be coupled in front of the lens. The lens of the camera system is designed to supply light from the environment surrounding the object to a sensor surface of an image sensor of the camera unit. The compendium includes a lens hood module, the lens hood module having one or more lens hoods and a lens hood opening defined by the one or more lens hoods, and the lens hood module opening being manually and / or motorically adjustable with respect to at least one of the following parameters: position, magnitude and geometric shape .

The lens hoods of the lens hood module described here can be pure lens hoods or field hoods.

Other features and advantages will become apparent to those skilled in the art when considering the detailed description below and the review of the accompanying drawings.

Figure list

• 1 schematisch und exemplarisch ein Kamerasystem gemäß einer oder mehreren Ausführungsformen;
• 2 schematisch und exemplarisch ein Kamerasystem gemäß einer oder mehreren Ausführungsformen;
• 3 schematisch und exemplarisch Konfigurationsmöglichkeiten eines Streulichtblendenmoduls gemäß einer oder mehreren Ausführungsformen;
• 4A-B schematisch und exemplarisch einen Einsatz eines Streulichtblendenmoduls gemäß einer oder mehreren Ausführungsformen; und
• 5 schematisch und exemplarisch eine Antriebseinheit für ein Streulichtblendenmoduls gemäß einer oder mehreren Ausführungsformen.

The parts shown in the figures are not necessarily to scale; rather, the emphasis is on presenting principles of the invention. Furthermore, reference numerals in the figures denote corresponding parts. The figures show:

• 1 schematically and exemplarily a camera system according to one or more embodiments;
• 2nd schematically and exemplarily a camera system according to one or more embodiments;
• 3rd schematic and exemplary configuration options of a lens hood module according to one or more embodiments;
• 4A-B schematically and exemplarily use of a lens hood module according to one or more embodiments; and
• 5 schematically and exemplarily a drive unit for a lens hood module according to one or more embodiments.

DETAILED DESCRIPTION

In the following detailed description, reference is made to the accompanying drawings, in which by way of illustration of specific embodiments it is shown how the invention can be put into practice.

Reference will now be made in detail to various embodiments and to one or more examples illustrated in the figures. Each example is presented in an illustrative manner and should not be interpreted as a limitation of the invention. For example, features illustrated or described as part of one embodiment may be applied to or in connection with other embodiments to produce yet another embodiment. The present invention is intended to encompass such modifications and variations. The examples are below Use of a specific language, which should not be construed as limiting the scope of the appended claims. The drawings are not to scale and are for illustration only. For better understanding, the same elements have been identified by the same references in the different drawings, unless otherwise stated.

The 1 shows schematically and by way of example an embodiment of a camera system 100 .

The camera system described here 100 is, for example, designed to be used in the context of cinematography, for example for recording a documentary, a feature film and the like. The camera system 100 can be a cinematographic camera system 100 his.

However, the present invention is not limited to cinematographic camera systems; with the camera system 100 For example, it can also be a medical-technical camera system, for example for the production of biomedical image recordings. Basically, all camera optics systems come into consideration, those with the lens hood module described here 50 can be equipped. These include, for example, camera systems for photography as well as camera systems for microscopy.

A camera unit 10th of the camera system 100 includes, for example, the usual components of a camera, which are not shown in the drawings or are shown only schematically.

To other components of the camera system 100 include, for example, camera optics with at least one lens 30th , a compendium 70 , a lens mount (not shown) at least one image sensor 20th the camera unit 10th , digital signal processing means, for example comprising a readout unit 91 that the image sensor 20th reads and corresponding data from a digital memory 92 feeds, as well as a controller 93 which is the readout unit 91 and / or the memory 92 controls, a user interface, communication interfaces (not shown), etc.

The details of exemplary configurations of the image sensor 20th downstream components should not be discussed in detail here, because their basic functions are known to the person skilled in the art.

The camera unit 10th can be designed to be used in the context of cinematography, for example for recording a documentary, a feature film and the like. The camera unit 10th can be a cinematographic camera unit 10th his. In another embodiment, the camera unit 10th trained for medical purposes, for example to generate images or image sequences of an object (eg a piece of tissue) or the like. As we have already described above, basically all camera optics systems come into consideration with the lens hood module described here 50 to be equipped. These include, for example, camera systems for photography as well as camera systems for microscopy.

The camera system 100 can be a digital camera system in which the image data using a digital image sensor 20th be generated. However, it is also within the scope of the invention that the image sensor 20th is in the form of an analog film still occasionally used today. In the camera system designed in this way, the images are recorded in an analog manner.

Typically, however, is the image sensor 20th designed as a digital image sensor, for example as a semiconductor chip with a large number of pixels, such as a CMOS or CCD image sensor.

The camera system comprises an image space 40 (which could also be called lens space) into which the lens 30th Light from the object 30th comprehensive environment and the image sensor 20th feeds, being between the lens 30th and the image sensor 20th further (in addition to the optical components not shown here) such as filters, lenses and the like can be provided.

It goes without saying that to a camera unit 10th different lenses 30th can be attached. The components compendium 70 , Lens 30th , as well as camera unit 10th can therefore be made as separate components. For example, the lens 30th different compendia 70 be coupled, different lenses 30th can to the camera unit 10th can be coupled, and different lenses, for example, on the same camera unit 30th be coupled, so that as a result the camera system 100 can be modular. For coupling the lens 30th to the camera unit 10th A lens mount (not shown) can be provided that also forms part of the camera system 100 can make out. A lens mount is available in almost all camera units; it represents the mechanical interface between lens and camera (unit). Lenses from different manufacturers often have different lens-side mount geometries, which is why the camera-side mounts can be exchanged or modified with adapters (in the professional cinematography area, in the photo area there are, for example, intermediate adapters).

The image sensor 20th the camera unit 10th has one in the picture space 40 pointing sensor surface 21 . The sensor surface 21 can from a sensor frame 22 be framed, with the sensor frame 22 also the image space 40 can limit and, for example, flush with the inner wall 400 of the image space 40 adjoins as schematically in the 1 is shown.

On the other hand, the image space 40 also from the lens 30th be limited. The objective 30th can through a lens frame 33 be limited, also the image space 40 can limit. Incidentally, the picture space 40 also from the inner wall 400 limited.

On the lens frame 33 (or elsewhere on the camera unit 10th or the camera system 100 ) can be a compendium 70 (also known as a matte box).

In the drawings is the picture space 40 always shown essentially cylindrical, in another embodiment the image space 40 has a conical section shape tapering in or against the direction of light incidence. Other geometrical designs of the image space 40 are possible.

The drawings here show simplified schematic representations of the camera unit 10th . The detailed design of the camera unit 10th , for example the components 70 , 40 , 30th , 20th such as 91 - 93 are less relevant here and are known to the person skilled in the art from the basic principle.

Apart from the coupling of the ambient light through the lens 30th can the image space 40 be designed to be essentially light-tight.

That the camera unit 10th comprehensive camera system 100 for capturing still and / or moving images consequently includes in particular the following components, which are along the optical axis A of the camera system 100 are arranged: the (for example digital) image sensor 20th , and the lens 30th which light from the surroundings of the sensor surface surrounding the object 21 of the image sensor 20th feeds.

Furthermore, according to the embodiments described here, a lens hood module 50 provided that related to the optical axis A either in front of the lens 30th , in the lens 30th or between the lens 30th and the image sensor 20th (as shown schematically and by way of example).

• - ausschließlich als Teil des Kompendiums 70;
• - ausschließlich als Teil des Objektivs 30;
• - ausschließlich als Teil des Objektivmounts;
• - ausschließlich als Teil der Kameraeinheit 10; oder
• - verteilt auf mindestens zwei der folgenden Komponenten des Kamerasystems: Kompendium 70, Objektiv 30, Objektivmount, Kameraeinheit 10.

The lens hood module 50 can be provided:

• - only as part of the compendium 70 ;
• - only as part of the lens 30th ;
• - only as part of the lens mount;
• - only as part of the camera unit 10th ; or
• - Distributed in at least two of the following components of the camera system: Compendium 70 , Lens 30th , Lens mount, camera unit 10th .

The lens hood module 50 is, for example, designed to at least reduce or completely avoid false light, for example in the form of scattered light. For example, the lens hood module 50 trained to reduce stray light on a rectangular surface, for example on a rectangular sensor surface 21 , for example, such that no or almost no light shines on the sensor frame 22 falls.

The lens hood module 50 includes one or more lens hoods, referring to the following 3rd and 4th will be explained in more detail (see the reference number there 501 , 502 , ff.), and a lens hood opening defined by the one or more lens hoods 500 .

The lens hoods described here (see reference number 501 , 502 , ff.) of the lens hood module 50 can be pure lens hoods or field diaphragms.

The lens hoods can e.g. consist of individual or several separate diaphragms or are designed as permanently connected / monolithic assemblies of several lens hoods.

• - vor dem Objektiv 30 angeordnet (z.B. als Teil des Kompendiums 70);
• - in dem Objektiv 30 angeordnet; oder
• - zwischen dem Objektiv 30 und dem Bildsensor 20 angeordnet (z.B. als Teil des Objektivmounts und/oder der Kameraeinheit 10).

The above options for positioning the lens hood module 50 (hereinafter also sometimes referred to simply as a "module" 50 referred to), refers, for example, to all the lens hoods that the module 50 may contain. For example, all the lens hoods are 501 , 502 , 503 a related to the optical axis A either:

• - in front of the lens 30th arranged (e.g. as part of the compendium 70 );
• - in the lens 30th arranged; or
• - between the lens 30th and the image sensor 20th arranged (eg as part of the lens mount and / or the camera unit 10th ).

In another embodiment, the lens hoods (if the module 50 contains several) can also be distributed, for example one in front of the lens 30th and one in the lens 30th , or one in the lens and another between the lens 30th and the image sensor 20th , etc. For one For optimal performance, it may be advantageous for the lens hoods to be distributed at suitable positions along the entire optical system.

Now also referring to the 3rd form the one or more lens hoods 501 , 502 , 503 So together they have the lens hood module 50 with the effective lens hood opening 500 out. The light, for example, along the optical axis A on the camera unit 10th strikes, passes through the lens hood module opening 500 before it hits the sensor surface 21 reached.

Each of the one or more lens hoods 501 , 502 , 503 can have an individual lens hood opening 5010 , 5020 respectively. 5030 exhibit. Are several lens hoods to form the lens hood module 50 provided, these are arranged, for example, one behind the other along the optical A. The incident light thus passes through the individual lens hood openings 5010 , 5020 respectively. 5030 sequentially and “sees” through the individual lens hood openings 5010 , 5020 respectively. 5030 formed effective lens hood module opening 500 , as in 3rd arrange light.

1. (i) Lage
2. (ii) Betragsmäße Größe
3. (iii) Geometrische Form

It is provided in the embodiments described here that the lens hood module opening 500 of the lens hood module 50 can be adjusted manually and / or by motor with respect to at least one of the following parameters:

1. (i) location
2. (ii) Amount of amount
3. (iii) Geometric shape

The first parameter, the position, is defined, for example, by the distance along the optical axis A between the sensor surface 21 on the one hand and that of the sensor surface 21 along the optical axis A closest lens hood (e.g. the lens hood 503 in the example according to 4A-B ) of the lens hood module 50 , which in one example is the only lens hood of the lens hood module 50 can be. Alternatively or additionally, the first parameter, the position, can be defined, for example, as a radial offset (based on the optical axis A ) a center of the effective lens hood module opening 500 from the optical axis. Alternatively or additionally, the first parameter, the position, can be defined, for example, a pivoting angle of the effective lens hood module opening 500 .

With a view to the optional change of the first parameter, the location, by bringing about or changing a radial offset (in relation to the optical axis A ) the center of the effective lens hood module opening 500 from the optical axis A the following is noted. According to one embodiment, the geometrical focal points are the aperture openings 5010 , 5020 , ... the lens hoods 501 , 502 , ... centered and not variable to the optical axis A arranged, so also the geometric center of gravity through the aperture openings 5010 , 5020 , ... the lens hoods 501 , 502 defined lens hood opening 500 of the module 50 , which is useful for most applications. In other applications, a variably adjustable offset to the optical axis can be used A However, it may be advantageous, as in asymmetrical optical systems, for example in head-mounted or head-up displays, mirror telescopes, etc., which is why this option is provided in accordance with one embodiment.

The same applies analogously to the optional change of the first parameter, the position, by bringing about or changing a pivoting angle (in relation to the optical axis) A ) the lens hood opening 500 : According to one embodiment, the aperture openings 5010 , 5020 , ... the lens hoods 501 , 502 , ... (i.e. their surfaces) perpendicular and not variable to the optical axis A arranged, so also the area through the aperture openings 5010 , 5020 , ... the lens hoods 501 , 502 defined lens hood opening 500 of the module 50 , which is useful for most applications. In other applications, a variably adjustable swivel angle to the optical axis can be used A however, be beneficial.

The second parameter, the magnitude of the size of the lens hood module opening 500 , is the area after the horizontal overlay of the individual lens hood openings 5010 , 5020 respectively. 5030 remains as in 3rd illustrated. The lens hoods 501 , 502 can be orthogonal sliders, and the lens hood 503 an iris diaphragm. But it should be noted, the lens hoods 501 , 502 but can also be rotated perpendicular to the optical axis (i.e. with a view of the 3rd parallel to the plane of the drawing shown there, around the optical axis A rotated), for example each rotated by + or - 45 °, or such lens hoods are used in addition to the orthogonal sliders. For example, it is the size of a horizontal axis perpendicular to the optical axis A lying area through the one or more lens hoods of the lens hood module 50 is defined. For example, in the exemplary embodiment according to 3rd a first lens hood 501 one by two frames 5011 , 5012 defined first, rectangular lens hood opening 5010 on. A second lens hood 502 has one by two frames 5021 , 5022 Defined second, rectangular lens hood opening 5020 on that compared to the first rectangular lens hood opening 5010 is rotated by 90 °. A third lens hood 503 has one by a circular frame 5031 defined third, circular lens hood opening 5030 on. In a horizontal projection along the optical axis A three lens hood openings overlap 5010 , 5020 , 5030 , and the common opening area defines the lens hood module opening 500 , i.e. the size of the lens hood opening 500 as in right 3rd illustrated. In the example there, the size of the lens hood module opening 500 thus defined by the first rectangular lens aperture 5010 , the second rectangular lens hood opening 5020 and through the third circular lens hood opening 5030 .

The third parameter, the geometric shape of the lens hood opening 500 , should be clear after the previous explanation. The geometric shape is defined, for example, by the circumferential course of the lens hood module opening 500 . For example, it can only be circular, only rectangular, only elliptical, but also - by combining appropriate lens hoods and / or the corresponding configuration of one of the individual lens hoods - can take any other shape, such as in the example according to 3rd illustrates where the circumferential course has several linear sections (formed by the frame 5011 , 5012 , 5021 , 5022 ) and several circular sections (formed by the frame 5031 ).

Embodiments of the camera system presented here 100 thus have a lens hood module 50 which is designed such that the lens hood module opening 500 of the lens hood module 50 with respect to at least one of the above three parameters can be set manually and / or by motor.

In some embodiments, only one of the three parameters is adjustable, e.g. the location.

In other embodiments, two of the three parameters are adjustable, e.g. Shape and size (note that a change in shape can imply a change in size and vice versa).

In still other embodiments, all three parameters are adjustable.

Exemplary embodiments are described below, according to which the manual and / or motorized adjustment can take place. The manual and / or motorized setting described below can in particular take place at a time when the module 50 as part of the camera system 100 is installed, for example, even while the camera system is in operation 100 .

In one embodiment, the module comprises 50 a plurality of lens hoods, at least one of the lens hoods (eg one of the hoods 501 , 502 , 503 ) is installed interchangeably. The exchange can be done manually or by motor. In this variant is the module 50 preferably either in the lens 30th or between lens and image sensor 20th arranged. By replacing the at least one lens hood, for example, the parameter “position” remains unchanged, but the shape and / or size of the lens hood module opening can change 500 to change.

In view of the interchangeability, it can be expedient, for example, that at least one of the lens hoods is installed by means of a magnetic mount. As an alternative or in addition, it is possible for at least one of the lens hoods to be perpendicular to the optical axis by actuating a slide A is interchangeable.

In another embodiment, at least one of the lens hoods is 501 , 502 , 503 adjustable with respect to at least one of their geometric properties. Again, this setting can be done manually and / or by motor. This setting can also be implemented in combination or as an alternative to the embodiment described above (interchangeable lens hood). An example setting of geometric properties is in 3rd illustrated.

For example, there is the first lens hood 501 the distance in the first horizontal direction Y (perpendicular to the optical axis A ) between the two frames 5011 and 5012 adjustable, which is illustrated by the double arrow shown. This setting can be done by motor and / or manually, for example by using only one of the two frames 5011 and 5012 is moved in or against the Y direction, or by both frames 5011 and 5012 be moved in or against the Y direction. By changing the distance between the frames 5011 and 5012 the size of the first aperture changes 5010 and thus the shape and size of the module opening 500 .

For the second lens hood 502 The same applies accordingly: there is, for example, the distance in the second horizontal direction X (perpendicular to the optical axis A and perpendicular to the first horizontal direction Y ) between the two frames 5021 and 5022 adjustable, which is illustrated by the double arrow shown. This setting can be done by motor and / or manually, for example by using only one of the two frames 5021 and 5022 is moved in or against the X direction, or by both frames 5021 and 5022 be moved in or against the X direction. By changing the distance between the frames 5021 and 5022 the size of the second aperture changes 5020 and thus the shape and size of the module opening 500 .

As already noted above, the lens hoods shown as orthogonal sliders can 501 and 502 also be arranged rotated around the optical axis A, for example the diaphragm 501 by + 45 °, and the aperture 502 by -45 °. According to yet another variant, not shown here, the module comprises 50 next to the in 3rd shown apertures 501 , 502 (in the form of the orthogonal sliders with variability in the X or Y direction) and 503 (In the shape of the iris diaphragm, there are two more sliders that, as described, about the optical axis A (i.e. in the drawing level of the 3rd ) are rotated, e.g. one by + 45 ° and the other by -45 °. This can have the advantage that there are no light-collecting edges / surfaces. Concave curved surfaces / edges can focus scattered light on the sensor and thus increase the visibility of the diaphragm edge / inner surface, which is usually undesirable.

At the third lens hood 503 is, for example, the radius r (perpendicular to the optical axis A ) adjustable. This setting can be done by motor and / or manually. By changing the radius, the size of the third aperture changes 5030 and thus the shape and size of the module opening 500 .

It goes without saying that in some applications it may be sufficient that, for example, only one of the lens hoods can be adjusted with respect to at least one of its geometric properties (for example distance between the diaphragm frame, radius, etc.), and that it may be useful in other applications, that multiple or all of the module's lens hoods 50 with regard to at least one of their respective geometric properties (for example distance between the diaphragm frame, radius, etc.) can be set.

In a further embodiment, in addition or as an alternative to the two setting options mentioned above, at least one of the lens hoods can be used 501 , 502 , 503 with regard to their distance from the sensor surface 21 along the optical axis A be adjustable. This aspect has already been explained above, in the representation of the "Location" parameter. The at least one of the lens hoods 501 , 502 , 503 with regard to their distance from the sensor surface 21 along the optical axis A can be adjustably mounted, for example, that aperture that the sensor surface 21 along the optical axis A closest. This setting of the "Position" parameter in the form of the distance to the sensor surface 21 can also be done by motor and / or manually. However, the adjustment requires the movable mounting of said at least one lens hood.

The options described here for manual and / or motorized adjustment of the lens hood module 50 has the advantage, for example, that the lens hood module 50 can be set to different sensor surfaces (regarding, for example, the shape and / or size of the respective sensor surfaces), which is with a view to the 2nd should be clarified:

The 2nd shows a further embodiment of the camera system in a schematic and exemplary manner 100 which can basically be configured in the same way as the embodiment according to 1 . The objective 30th includes the two lenses shown 31 and 32 which the light arriving from the environment to the image sensor 20th conduct. The module 50 includes four lens hoods 501 , 502 , 503 and 504 , with the lens hood 501 in the lens 30th is arranged, and the remaining three lens hoods 502 , 503 and 504 between the lens 30th and the image sensor 20th , for example as part of the camera unit 10th and / or as part of a lens mount (not shown).

By setting the second lens hood 502 and the third and fourth lens hoods 503 and 504 can use the individual lens hood openings 5020 , 5030 , 5040 can be set, and thus the effective module opening 500 . The first lens hood 501 is not adjustable, for example. The second lens hood 502 is, for example, in terms of their distance along the optical axis A to the image sensor 20th permanently installed, but in terms of the size and / or shape of their opening 5020 adjustable, which is shown by the solid line and dashed line. At least one of the two lens hoods 503 , 504 can be installed interchangeably, for example, so that either the lens hood opening 5030 or the lens hood opening 5040 is present, which in turn is represented by the solid line and dashed line. Alternatively, it is also conceivable that the two lens hoods 503 , 504 are implemented as a single lens hood, the size and / or shape of their opening 5030 ; 5040 is adjustable. So the module can 50 on different sized sensor surfaces 21 , 21 ' can be set.

For example, by setting the module 50 Avoid getting light on the sensor frame 22 (in 2nd not shown), but falls exclusively on those for image acquisition relevant sensor surface 21 , either on the entire sensor surface 21 or only part of it.

The adjustability of the module described above 50 can, for example, also enable a so-called lens hood look to be set. A reduction in stray light can be minimized, for example, for a so-called vintage look up to the complete removal of the lens hoods. In the case of shots for computer-generated imagery (CGI) -rich scenes or available light shots in dark light conditions with artificial light sources in the object field or in the vicinity of the object field, etc., the reduction in stray light can be maximized by selecting the appropriate lens hoods. CGI can be used to achieve special effects by animating, rendering, and fusing image content completely with computer support and fusing it with “normal” camera recordings. The corresponding calculations must also simulate the malfunctions of the optical systems used, which complicates the calculations. For this reason, it is sometimes easier / desirable to record images for these purposes with as little interference as possible and, if necessary, to apply virtual interference to the images that have already been merged.

In addition, the adjustability of the module described above 50 enable targeted and significant reduction in stray light, for example to significantly increase the image dynamics in difficult lighting conditions of a scene. For example, it may be possible to increase the image dynamics by a few f-stops.

As described above, the setting of the module 50 at least partially, but also exclusively by motor. The camera system points to this 100 for example one in the 1 to 4th not and in 5 schematically and exemplarily shown electromotive drive unit 55 to adjust the lens hood opening 500 is trained.

The electromotive drive unit 55 can be designed, the module 50 with regard to at least one of the above three parameters (position, shape, size of the opening 500 ) to set.

According to the possibilities of arranging the module described above 50 and the configuration of the module 50 can also the drive unit 55 arranged and configured.

So the drive unit 55 eg as part of the compendium 70 , as part of the lens 30th , as part of the lens mount or as part of the camera unit 10th be implemented.

The drive unit 55 can be formed, the lens hood module opening 500 with regard to at least one of the parameters mentioned, to be set by motor: position, magnitude and geometric shape.

The drive unit 55 can be designed to initiate this setting upon user input. The drive unit 55 can, for example, itself have a user interface and corresponding signal processing means in order to process and implement a user input.

The electromotive setting of the module 50 can thus take place depending on user input, for example. For this purpose, the camera system has, for example, a suitably designed user interface (not shown). The user input can, however, additionally or alternatively to the direct input on the drive unit 55 for example via the controller 93 be fed.

In particular, the camera unit 10th be trained, the setting of the module 50 relevant control signal 555 to generate, and the drive unit 55 feed. Depending on this control signal 555 can the drive unit 55 then the setting of the module 50 make.

The control signal 555 can, as already indicated, be generated, for example, as a function of a user input.

The generation of the control signal 555 can in particular by the controller 93 implemented, for example, designed to execute a related control algorithm.

The control signal 555 is generated, for example, as a function of at least one of the following parameters: a lens change, a focal length setting; an aperture setting; a focus position; a type of the image sensor 20th ; a crop factor; one from the image sensor 20th output image sensor signal.

For example, the controller 93 trained by the readout unit 91 Image data (or video data) to be received by the readout unit 91 generated depending on the image sensor signals, evaluate, and provide the control signal depending on the evaluation.

The control signal 555 can, for example, increase or decrease the size of the lens hood opening 500 pretend to change the shape of the lens hood opening 500 and / or a change in the position of the lens hood opening 500 .

The implementation of such a command by the drive unit 55 can then be carried out in various ways, for example by adjusting one or more of the lens hoods with regard to the shape, position and / or size of the individual aperture, and / or by automatically replacing one of the lens hoods with another lens hood.

Alternatively or additionally, the controller can 93 be formed, a current crop factor of the camera unit 10th , and / or a current focal length setting of the camera unit 10th , and / or a current aperture setting of the camera unit 10th , and / or a current focus position of the camera unit 10th , and / or a currently used type of image sensor 20th to determine, for example, based on data from the camera unit 10th or the lens used 30th are made available (eg so-called LDS (Lens Data System) data and / or camera metadata) and, depending on the specific parameter or parameters, the generation of the control signal 555 arrange accordingly.

As I said, the camera unit 10th the controller 93 comprise, which can be designed to execute a control algorithm for generating the control signal.

The transmission of the control signal 555 from the controller to the drive unit 55 can be wireless and / or wired.

According to a further embodiment, the module 50 and / or the drive unit 55 trained a status signal to the controller 93 to transfer that is indicative of a current setting of the module 50 is.

The setting of the module 50 can be carried out in accordance with the above according to one or more embodiments in particular fully automatically by the controller 93 executes the control algorithm, depending on which it generates the control signal and the electromotive drive unit 55 feeds.

Generally speaking, the camera system can 100 thus be formed, the setting of the lens hood module opening 500 automated by means of the drive unit 55 to make.

According to a further embodiment, the lens hood module 50 made entirely or partially by a 3D printing process.

The lens used here can e.g. an anamorphic lens or a radially symmetric lens.

Finally show 4A-B schematic and exemplary use of the lens hood module 50 according to one or more embodiments. This module 50 includes the three different panels 501 , 502 and 503 between the lens 30th and the image sensor 20th are arranged sequentially along the optical axis A. The light injected by the lens L falls through the three lens hood openings 5010 , 5020 and 5030 before it hits the sensor surface 21 reached. The lens hood openings 5010 , 5020 and 5030 are set in such a way that the overall effective lens hood module opening (see reference number 500 in 3rd ) the light L on the sensor surface 21 projected, but eg avoids the light on the sensor frame 22 falls.

As used herein, the terms "having", "containing", "including", "comprehensive", "exhibiting" and the like are open terms that indicate the presence of listed elements or features but do not exclude additional elements or features.

In view of the above range of variations and applications, it should be understood that the present invention is not limited by the foregoing description, nor is it limited by the accompanying drawings. Rather, the present invention is limited only by the following claims and their legal equivalents.

QUOTES INCLUDE IN THE DESCRIPTION

This list of documents listed by the applicant has been generated automatically and is only included for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions.

Patent literature cited

• WO 2006/012859 A2 [0002]

Claims (21)

Camera system (100) comprising a camera unit (10) for capturing still and / or moving images of an object, the camera unit (10) containing the following components, which are arranged along an optical axis (A) of the camera system (100): - an image sensor (20); - a lens (30), the lens (30) being designed to supply light from the surroundings surrounding the object to a sensor surface (21) of the image sensor (20); - With respect to the optical axis (A) either in front of the lens (30), in the lens (30) or between the lens (30) and the image sensor (20) arranged lens hood module (50), the lens hood module (50) or more lens hoods (501, 502, 503) and a lens hood module opening (500) defined by the one or more lens hoods (501, 502, 503), and wherein the lens hood module opening (500) is manual and / or motorized with respect to at least one of the following parameters The following can be set: position, size and geometric shape. Camera system (100) after Claim 1 , wherein at least one of the lens hoods (501, 502, 503) is installed interchangeably. Camera system (100) after Claim 1 or 2nd , at least one of the lens hoods (501, 502, 503) being adjustable with respect to at least one of its geometric properties. Camera system (100) according to one of the preceding claims, wherein at least one of the lens hoods (501, 502, 503) is adjustably mounted with respect to its distance from the sensor surface (21) along the optical axis (A). Camera system (100) according to one of the preceding claims, further comprising an electromotive drive unit (55) which is designed to adjust the lens hood module opening (500). Camera system (100) after Claim 5 , The drive unit (55) being designed to make the setting of the lens hood module opening (500) as a function of a user input. Camera system (100) after Claim 5 or 6 The drive unit (55) is designed to adjust the lens hood opening (500) as a function of a control signal generated by the camera unit (10). Camera system (100) after Claim 7 , wherein the control signal is generated as a function of at least one of the following parameters: a lens change, a focal length setting; an aperture setting; a focus position; a type of the image sensor (20); a crop factor; an image sensor signal output by the image sensor (20). Camera system (100) after Claim 8 wherein at least one of the parameters is determined based on data provided by the lens (30) and / or based on camera metadata. Camera system (100) after Claim 7 or 9 , wherein the camera unit (10) comprises a controller (93) which is designed to execute a control algorithm for generating the control signal. Camera system (100) according to one of the preceding Claims 5 to 10th The camera system (100) is designed to make the setting of the lens hood module opening (500) automatically by means of the drive unit (55). Camera system (100) according to one of the preceding claims, wherein the lens hood module (50) is designed to reduce stray light to a rectangular area. Camera system (100) according to one of the preceding claims, wherein at least one of the lens hoods (501, 502, 503) is installed by means of a magnetic mount. Camera system (100) according to one of the preceding claims, wherein at least one of the lens hoods (501, 502, 503) can be replaced by actuating a slide perpendicular to the optical axis (A). Camera system (100) according to one of the preceding claims, wherein the lens hood module opening (500) can be adjusted manually and / or by motor in such a way that it can be adapted to differently sized sensor surfaces (21, 21 '). Camera system (100) according to one of the preceding claims, wherein the lens hood module (50) is at least partially produced by a 3D printing process. Camera system (100) according to one of the preceding claims, wherein the lens (30) is an anamorphic lens or a radially symmetrical lens. Objective (20) for a camera system (100), comprising a camera unit (10) for capturing still and / or moving images of an object, the objective (30) being designed to emit light from the surroundings of the object To supply sensor surface (21) of an image sensor (20) to the camera unit, and wherein the lens comprises: - a lens hood module (50), the lens hood module (50) one or more lens hoods (501, 502, 503) and one through the one or more Lens hoods (501, 502, 503) have defined lens hood opening (500), and the lens hood module opening (500) can be adjusted manually and / or by motor with respect to at least one of the following parameters: position, magnitude and geometric shape. Camera unit (10) for a camera system (100) for capturing still and / or moving images of an object, the camera system (100) comprising a lens (30) which is designed to emit light from the surroundings of a sensor surface (21 ) of an image sensor (20) to the camera unit (10), and wherein the camera unit (10) comprises: - A lens hood module (50), the lens hood module (50) having one or more lens hoods (501, 502, 503) and a lens hood opening (500) defined by the one or more lens hoods (501, 502, 503), and the lens hood module opening (500) can be adjusted manually and / or by motor with respect to at least one of the following parameters: position, magnitude and geometric shape. Lens mount for a camera system (100) for capturing still and / or moving images of an object, wherein the camera system (100) comprises a lens (30) which is designed to emit light from the surroundings of the sensor surface (21) of an image sensor which comprises the object (20) to a camera unit (10) of the camera system, and wherein the lens mount is designed to be coupled between the lens (30) and the camera unit (10), and wherein the lens mount (10) comprises: - A lens hood module (50), the lens hood module (50) having one or more lens hoods (501, 502, 503) and a lens hood opening (500) defined by the one or more lens hoods (501, 502, 503), and the lens hood module opening (500) can be adjusted manually and / or by motor with respect to at least one of the following parameters: position, magnitude and geometric shape. Compendium (70) for a camera system (100) for capturing still and / or moving images of an object, the camera system (100) comprising a lens (30) which is designed to emit light from the surroundings of a sensor surface (21 ) an image sensor (20) to a camera unit (10) of the camera system (100), and wherein the compendium (70) is designed to be coupled in front of the lens (30), and wherein the compendium (10) comprises: - A lens hood module (50), the lens hood module (50) having one or more lens hoods (501, 502, 503) and a lens hood opening (500) defined by the one or more lens hoods (501, 502, 503), and the lens hood module opening (500) can be adjusted manually and / or by motor with respect to at least one of the following parameters: position, magnitude and geometric shape.

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