CN113359283B - High-optical-expansion modularized zoom lens for machine vision - Google Patents
High-optical-expansion modularized zoom lens for machine vision Download PDFInfo
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- CN113359283B CN113359283B CN202110812315.6A CN202110812315A CN113359283B CN 113359283 B CN113359283 B CN 113359283B CN 202110812315 A CN202110812315 A CN 202110812315A CN 113359283 B CN113359283 B CN 113359283B
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B15/00—Optical objectives with means for varying the magnification
- G02B15/14—Optical objectives with means for varying the magnification by axial movement of one or more lenses or groups of lenses relative to the image plane for continuously varying the equivalent focal length of the objective
- G02B15/16—Optical objectives with means for varying the magnification by axial movement of one or more lenses or groups of lenses relative to the image plane for continuously varying the equivalent focal length of the objective with interdependent non-linearly related movements between one lens or lens group, and another lens or lens group
- G02B15/163—Optical objectives with means for varying the magnification by axial movement of one or more lenses or groups of lenses relative to the image plane for continuously varying the equivalent focal length of the objective with interdependent non-linearly related movements between one lens or lens group, and another lens or lens group having a first movable lens or lens group and a second movable lens or lens group, both in front of a fixed lens or lens group
- G02B15/167—Optical objectives with means for varying the magnification by axial movement of one or more lenses or groups of lenses relative to the image plane for continuously varying the equivalent focal length of the objective with interdependent non-linearly related movements between one lens or lens group, and another lens or lens group having a first movable lens or lens group and a second movable lens or lens group, both in front of a fixed lens or lens group having an additional fixed front lens or group of lenses
- G02B15/173—Optical objectives with means for varying the magnification by axial movement of one or more lenses or groups of lenses relative to the image plane for continuously varying the equivalent focal length of the objective with interdependent non-linearly related movements between one lens or lens group, and another lens or lens group having a first movable lens or lens group and a second movable lens or lens group, both in front of a fixed lens or lens group having an additional fixed front lens or group of lenses arranged +-+
Abstract
The present invention relates to an optical zoom lens assembly for use with a camera or eyepiece for the purpose of viewing and inspecting an object, or for use with other modules or lenses, or lens groups or other optical components, or at least as a complement to parts, to form a set of optical imaging systems. It includes a core zoom module comprising five optical groups configured to provide at least a 7:1 afocal lens, the optical components having an etendue of between 1.15-4.65mm2sr, and configured in accordance with 8MP and 32MP image sensors.
Description
Technical Field
The present invention relates to an optical zoom lens assembly for use with a camera or eyepiece for the purpose of viewing and inspecting objects. In particular, the present invention relates to an optical assembly or lens assembly, characterized in that: having multiple modular parts, high etendue-preserving characteristics, wide wavelength correction ranges, or large zoom ranges, or a combination of characteristics thereof.
Background
The history of long working distance limited conjugate lenses with large zoom ranges can be traced back to decades. At that time, bausch and Lomb used a Zoom module manufactured starting in 1959 in their Stereo Zoom types 4 to 7. The most common zoom range manufactured is 0.7X-3X with a zoom ratio of about 4.3:1. The attached figure 1 is as follows: eyepiece cabins used by conventional Bausch and Lomb stepeozoom 4 with magnification range of 0.7-3X. Fig. 2 is: conventional Bausch and Lomb StereoZoom4 used complete stereomicroscope scaffolds.
Even then, an eyepiece lens design was introduced so that the stereoscopic microscope lens could be used on a variety of supports and tables. The product is intended for use with eyepiece magnification lenses, which define the limited field of view required, and the limited numerical aperture required to achieve a limited resolution of 2 arc minutes/ray pair.
Starting from the 80 s of the 20 th century, technological innovation eventually proceeds in two product development routes, which are continued until now. One route involves continued use within the scope of a stereomicroscope. FIG. 3 is a schematic diagram ofA traditional StereoZoom microscope example of the jeweler still in use today. The stereo microscope zoom ratio shown in fig. 3 is typically 6.5:1, with a zoom chamber in the magnification range of 0.7-4.5X being typically used. The optical assembly according to fig. 3 can be used for various ocular magnifiers and Barlow lenses to adjust the visual magnification. Another approach involves using a zoom chamber with a zoom ratio of 6.5:1, much like a monocular video system. These systems can display an object or scene picture on a block of sensors, typically referred to as a 2/3 "frame camera, of up to about 11 mm. The field of view and the 0.0388 approximate maximum back Numerical Aperture (NA) remain approximately the same as the original stereomicroscope design. These cameras, if maximally utilized, or otherwise optimized for maximum performance quality or efficiency, can achieve substantially 0.45mm at near field diffraction limit 2 Maximum etendue of sr (square millimeter steradian).
FIG. 4 illustrates by way of example that an optical etendue of approximately 0.45mm may be achieved 2 sr, and has near field diffraction defining properties. Three arrangements are included in fig. 4, including a low magnification arrangement above the picture, a medium magnification arrangement in the middle, and a high magnification arrangement at the bottom of the picture.
This possibility is believed to be due to a large loss of relative illuminance and/or increased aberrations. For a larger sensor, for example: a diagonal 16mm, or 1 "format sensor may be combined with the optical components of fig. 4. Thus, approximately the same optical assembly as used in the microscope of FIG. 3 can be oriented above 0.45mm 2 sr, max about 0.95mm 2 The one inch web sensor field of view in a camera operating over an etendue range of sr provides an image. But such a camera will exhibit significantly lower diffraction limited performance.
What is desired is a camera comprising an optical assembly configured to be positioned at 0.45mm 2 The etendue range above sr exhibits near field diffraction-defining properties such as: at about 0.45-0.95mm 2 sr or aboutAn etendue range between 0.5-1. It is also desirable to have such a camera and optical assembly by being disposed at about 1-5mm 2 sr optical expansion range, in particular such cameras and optical components, may also exhibit near field diffraction limited performance.
Drawings
Fig. 1 is: conventional eyepiece pods used by Bausch and Lomb stepeozoom 4 with magnification range 0.7-3X (prior art).
Fig. 2 is: conventional whole-stereoscopic microscope stents (prior art) used by Bausch and Lomb stepeozoom 4.
Fig. 3 is: a StereoZoom microscope (prior art) of a traditional jeweler.
Fig. 4: illustrating by way of illustration an etendue of approximately 0.45mm 2 sr microscopy uses conventional optics (prior art).
Fig. 5A-5B: a specific embodiment of a finite yoke of an optical component or a finite yoke camera for a microscope is illustrated by way of illustration and comprises three optical modules, wherein module 1 comprises a lens attachment with positive focal length group G1A, module 2 comprises a 7:1 afocal lens with an etendue of about 1.57mm2sr, and further comprises 5 lens groups, the 5 lens groups comprising: a stationary positive group G1B, a negative active group G2, a positive active group G3, a negative active group G4 and a stationary positive group G5A, the module 3 comprising a back adapter with a positive focal group G5B.
Fig. 6: is a system diagram of an embodiment of a high etendue limited-yoke zoom lens system having modular features, including an objective lens or lens attachment with positive lens group G1A, a core zoom with lens groups G1B, G2, G3, G4, G5A, a sleeve lens with positive lens group G5B, and various illumination, maneuvers, supports, and listed focus modules.
Fig. 7: an etendue of about 1.57mm is illustrated by the figure 2 First embodiment of a core zoom or afocal module of an optical assembly of a sr finite yoke system, comprising a stationary positive groupG1B, a negative active set G, a positive active set G3, a negative active set G4, a stationary positive set G5A.
Fig. 8: illustrating by way of illustration an etendue of approximately 1.54mm 2 A second specific embodiment of the core zoom assembly or afocal module of the sr optical component comprises a stationary positive group G1B, a negative active group G2, a positive stationary group G3, a negative active group G4, and a stationary positive group G5A.
Fig. 9: a third specific embodiment of a core zoom or afocal module for an optical component of a limited yoke optical system having an etendue of about 1.58mm2sr is illustrated and includes a stationary positive group G1B, a negative active group G2, a negative active group G3, a negative active group G4, and a stationary positive group G5A.
Fig. 10: illustrating by way of illustration an etendue of approximately 1.58mm 2 A fourth specific embodiment of a core zoom or afocal module of an optical component of the sr finite yoke optical system comprises a stationary positive group G1B, a negative active group G2, a positive active group G3, a negative active group G4, a stationary positive group G5A. FIG. 11 schematically illustrates an optical expansion of about 2.88mm 2 A fifth particular embodiment of a core zoom or tele assembly of optical components of the sr finite yoke optical system comprises a stationary positive group G1B, a negative active group G2, a negative active group G3, a negative active group G4, and a stationary positive group G5A.
Fig. 12: illustrating by way of illustration an etendue of approximately 4.62mm 2 A sixth specific embodiment of a core zoom or afocal module for an optical component of an sr finite yoke optical system includes a stationary positive group G1B, a negative active group G2, a positive stationary group G3, a negative active group G4, and a stationary positive group G5A.
Fig. 13: in the embodiment of the module 3 shown in fig. 5A-5B, a ferrule lens pattern is shown, possibly with an etendue of about 1.58mm 2 sr, size A, B,C is a variable as set forth in table 8.
Fig. 14: an example of a rear adapter optic having the optical index set forth in table 10 is illustrated by way of illustration.
Fig. 15: an example of a rear adapter optic having the optical index set forth in Table 11 is illustrated by way of illustration.
FIG. 16 illustrates, by way of illustration, an example of a rear adapter optic having the optical index set forth in Table 12.
Fig. 17 illustrates, by way of illustration, an example of a lens accessory optic having the optical index set forth in table 13.
Fig. 18 illustrates, by way of illustration, an example of a lens accessory optic having the optical index set forth in table 14.
Description of examples
Table 1: including an example of an optical index for an example of a limited yoke distance optical component configured in accordance with a particular embodiment and illustrated schematically in fig. 5A.
Table 2: an example of an optical index comprising an example of an optical component configured in accordance with a particular embodiment and illustrated schematically in fig. 7.
Table 3: an example of an optical index comprising an example of an optical component configured in accordance with a particular embodiment and illustrated schematically in fig. 8.
Table 4: an example of an optical index comprising an example of an optical component configured in accordance with a particular embodiment and illustrated schematically in fig. 9.
Table 5: an example of an optical index comprising an example of an optical component configured in accordance with a particular embodiment and illustrated schematically in fig. 10.
Table 6: an example of an optical index comprising an example of an optical component configured in accordance with a particular embodiment and illustrated schematically in fig. 11.
Table 7: an example of an optical index comprising an example of an optical component configured in accordance with a particular embodiment and illustrated schematically in fig. 12.
Table 8: including specific embodiments of lens attachments or objectives having a long working distance/focal length ratio (WD/FL) and having an outer entrance pupil of 16-25mm diameter disposed at a distance of 50,75,100 or 150mm or more.
Table 9: specific embodiments including a rear adapter or sleeve lens having a short optical path/focal length ratio and having an outer entrance pupil of 16-25mm diameter disposed at a distance of 50,75,100,150mm or greater and an etendue of approximately 1.58mm 2 sr。
Table 10: including an example of an optical index for an optical component configured in accordance with the particular embodiment shown in fig. 14.
Table 11: including an example of an optical index for an optical component configured in accordance with the particular embodiment shown in fig. 15.
Table 12: including an example of an optical index for an optical component configured in accordance with the particular embodiment shown in fig. 16.
Table 13: including an example of an optical index for an optical component configured in accordance with the particular embodiment shown in fig. 17.
Table 14: including an example of an optical index for an optical component configured in accordance with the particular embodiment shown in fig. 18.
Table 15: including a zoomed field of view of a view matrix according to a particular embodiment.
DETAILED DESCRIPTION OF EMBODIMENT (S) OF INVENTION
A limited yoke camera or microscope includes a modular optical assembly or modular lens system capable of providing a range of numerical apertures, or numerical apertures through a variety of sensor format sizes, and having zoom capability. A lens system according to one embodiment may have advantageous etendue defined as the product of pupil area and solid angle of field of view [ Smith-modern optical design, page 716]. [ etendue=pi×a×sin ] 2 θ]Equation 1[ Bentley ]&View-field guidance for Olson-lens design, page 120, incorporated by reference in its entirety]For a plane having a uniform solid angle, where A is the area of the plane and θ is the edge beam angleHalf of the total.
An etendue of about 1.15mm is provided 2 sr, or higher, lens near field diffraction defines an optical design, such a lens being configured as a substantially fully usable, 8MP sensor with an aspect ratio of about 4:3. An optical expansion of about 4.65mm is provided by a similar design 2 The near field diffraction of sr defines an optical system that is configured to approximately fully utilize a 32MP sensor having a length ratio of approximately 4:3. A near field diffraction-limited optical design, which in certain embodiments will typically have a stell rate exceeding 0.7, 0.75, 0.8, 0.85 or 0.9, as with near field diffraction-limited performance, will be referred to herein generally as a finite yoke optical component having a stell rate of at least 0.8. In certain embodiments of the optical component, an etendue of about 1.15 and 4.65mm is provided 2 The lens system between sr, on digital or analog image acquisition devices with various aspect ratios of 4075-8194 single sensing means over the entire diagonal range of the device, are configured to substantially achieve sensor-defined performance. These single sensing devices are commonly referred to as pixels of digital cameras. Various embodiments and examples are presented, including an etendue preserving lens system that includes a zoom ratio that varies by at least 5.5:1 with etendue at 1.45 and 4.65mm 2 sr. In general, conventional lens systems with similar large zoom ranges, the maximum etendue + etendue values are at 0.237 and 0.55mm 2 Between sr.
According to an optical component of a particular embodiment, the zoom range may be between 5.5:1 and 16:1. In fig. 5A-5B, specific embodiments of the optical layout of a limited yoke camera or microscope are illustrated by way of example. The limited yoke distance optics are typically used to display pictures of objects that are placed at distances less than the 21x, 20x, or 19x focal distance of the optics. The limited yoke optical component may, together with the image sensor, constitute a limited yoke camera or possibly an eyepiece for viewing the object through the naked eye. The limited yoke camera may include a screen, a processor, memory for storing pictures, and a wired and/or wireless communication interface for receiving and/or transmitting picture data.
Various embodiments have many positive focal length lens attachments, modules 1, groups G1A, resembling large field of view (FOV) microscope eyepieces. These lens attachments allow for varying working distances, object numerical aperture values, fields of view, and/or telecentricity levels. Various embodiments are also possible with one core zoom, afocal module 2, and providing a zoom ratio between 5.5:1 and 16:1. Various embodiments are also possible with many positive focal length adapter tubes or rear accessories, modules 3, group G5B, similar to a cannula lens. The adapter sleeve attachment can change the sensor size range and the sensor side numerical aperture value.
In fig. 5A-5B, the core zoom module of the limited yoke optical component shown in fig. 5A-5B, the module 2 includes 5 lens groups G1B, G2, G3, G4, G5A.
The conventional optical component shown in fig. 4 does not include the group G3. Group G3 may include a stationary or movable lens group. Group G3 may include a positive or negative lens group. Group G3 may include one single lens, or two or more lenses.
Fig. 6 shows a specific embodiment of a modular system with various combinations of modules 1,2 and 3. Such modular designs may include two or more modules or module components that may be serviced or replaced or calibrated separately from the other modules in general. According to certain embodiments, the sensor module may be incorporated into an imaging system. Other module configurations may include a motorized module, a lighting module, a processing module, an interface module, a communication module, or a combination of these modules.
In some embodiments, aberration control is higher than in other embodiments, which facilitates modularity of the system, which may function better. The magnification of the optical component systems according to certain embodiments may be higher than 2 times at their high magnification point.
Core zoom module
Further implementations of afocal lens group or module 2 or core zoom moduleFor example, it may include or otherwise be configured in accordance with one or more of the following features. The afocal lens is provided in accordance with certain embodiments configured to reduce the pupil to a minimum total movement length. With these embodiments, the optical aberration can be thoroughly controlled. These together may better combine multiple objectives and sleeve lenses together, providing optimal performance along with core zoom. These improved overall system performance have a larger aperture and field of view than previously provided. The combination together will result in more optical bandwidth for a range of 1.15-4.65mm 2 At the sr exit pupil, indicated by the minimum etendue value for the low magnification zoom position, at the maximum etendue point of the zoom lens for an optical system configured according to some embodiments with 8MP-32MP sensors, respectively.
A first embodiment of the core zoom module comprises a 7:1 afocal lens assembly having an etendue of about 1.57mm in its low power position 2 sr. The specific embodiment is shown in fig. 7, and includes a positive film group (G1B), a movable negative film group (G2), a movable positive film group (G3), a movable negative film group (G4), and a positive film group (G5A). A numerical example according to this particular embodiment is given in table 2. Three arrangements are included in fig. 7, including a low magnification arrangement above the picture, a medium magnification arrangement in the middle, and a high magnification arrangement at the lowest of the pictures.
A second embodiment of the core zoom module comprises a 7:1 afocal lens assembly having an etendue of about 1.54mm in its low magnification position 2 sr. This embodiment is shown in fig. 8 and includes a positive group (G1B), a movable negative group (G2), a movable positive group (G3), a movable negative group (G4), and a positive group (G5A). A numerical example according to this particular embodiment is given in table 3. Three arrangements are included in fig. 8, including a low magnification arrangement above the picture, a medium magnification arrangement in the middle, and a high magnification arrangement at the lowest of the pictures.
The first one of the core zoom modulesThree embodiments include a 7:1 afocal lens assembly having an etendue of about 1.58mm in its low power position 2 sr. This embodiment is shown in fig. 9 and includes a positive group (G1B), a movable negative group (G2), a movable negative group (G3), a movable negative group (G4), and a positive group (G5A). A numerical example according to this particular embodiment is given in table 4. Three arrangements are included in fig. 9, including a low magnification arrangement above the picture, a medium magnification arrangement in the middle, and a high magnification arrangement at the lowest of the pictures.
A fourth embodiment of the core zoom module comprises a 16:1 afocal lens assembly having an etendue of about 1.58mm in its low power position 2 sr. This embodiment is shown in fig. 10 and includes a positive group (G1B), a movable negative group (G2), a movable positive group (G3), a movable negative group (G4), and a positive group (G5A). A numerical example according to this particular embodiment is given in table 5. Three arrangements are included in fig. 10, including a low magnification arrangement above the picture, a medium magnification arrangement in the middle, and a high magnification arrangement at the lowest of the pictures.
A fifth embodiment of the core zoom module comprises a 6.2:1 afocal lens assembly having an etendue of about 2.88mm in its low power position 2 sr. This embodiment is shown in fig. 11 and includes a positive group (G1B), a movable negative group (G2), a movable negative group (G3), a movable negative group (G4), and a positive group (G5A). A numerical example according to this particular embodiment is given in table 6. Three arrangements are included in fig. 11, including a low magnification arrangement above the picture, a medium magnification arrangement in the middle, and a high magnification arrangement at the lowest of the pictures.
A sixth embodiment of the core zoom module comprises a 5.7:1 afocal lens assembly having an etendue of about 4.62mm in its low power position 2 sr. This embodiment is shown in FIG. 12 and includes a positive plate group (G1B), a movable negative plate group (G2), a fixed positive plate group (G3), a movable negative plate group (G4), and a positive plateGroup (G5A). A numerical example according to this particular embodiment is given in table 7. Three arrangements are included in fig. 12, including a low magnification arrangement above the picture, a medium magnification arrangement in the middle, and a high magnification arrangement at the lowest of the pictures.
Another core zoom module embodiment may include 5 optical groups having general properties similar to those of figures 7-12 and the numbers in tables 2-7. For example, another embodiment may also include a lens accessory group G1A and/or a rear adapter group G5B, either as a separate optical assembly or with a core zoom component in one module. According to further embodiments various zoom ratios between 5.5:1 and 16:1 and between 1.15 and 4.65mm are provided 2 Etendue between sr. Further embodiments may include larger diameters required to correct other aberrations, as well as longer optical path designs, which are present in high zoom ranges of high etendue designs and/or larger magnification. To achieve near field diffraction limited performance, other design features may be included, such as more optical elements per group or aspherical elements, for example: in other embodiments, which may be considered variations of the embodiments described herein. Further alternative embodiments may be used for three general packet types, namely type 1 #Positive film static group G1BNegative active group G2, positive fixed group G3, negative active group G4, positive static group G5A), 2%Positive still group G1BNegative active set G2, positive active set G3, negative active set G4, positive static set G5A), 3%Positive still group G1BNegative active set G2, negative active set G3, negative active set G4, positive stationary set G5A), as each version may provide significant benefits for aberration correction and pupil compression. In various alternative embodiments, group G3 may comprise a positive or negative active group, or group G3 may be stationary.
In order to provide good optical correction for chromatic aberration, afocal lens assemblies may be designed according to certain embodiments. For a given system wavelength and aperture, one can mirrorCorrecting the head to make the axial color separation smaller than or equal to the focal depth of light, and defining a focal depth equation according to Rayleigh standard, wherein DOF is = + -lambda/(2 xNA) 2 ) [ Smith-modern optical design, page 715 ]]The wavelength of light is defined here as 430-670 nm. This is particularly advantageous for zoom lenses according to some embodiments described, e.g. an extended range of 5.5X-16X.
When paired with a modular objective and cannula lens according to certain embodiments, certain embodiments may achieve, for the 430-1100nm band encompassing the visible and Near Infrared (NIR) spectrum, less than 3,2, 1, or even less than half the depth of focus, for axial color separation relative to 550nm wavelengths.
To correct for color separation in the 900-1700nm wavelength range, or Short Wave Infrared (SWIR), the fitting adjustments of the specific embodiments described may be used.
Similarly, the axial separation of wavelengths in this range may reach a depth of focus of 3,2, 1, or even less than half the depth of focus, relative to 1200nm wavelengths, in alternative embodiments.
Such low grade axial discoloration in near infrared and short wave infrared light allows the user to use the same lens system to inspect both visible and infrared light applications. This increased wavelength focusing capability provides additional capability to collect information about the sample, as does a higher aperture. As an example of the use of one embodiment, this capability may be used to inspect the surface of a part requiring detailed inspection with short wavelength blue light, and thus continue to study subcutaneously with near infrared light, with or without any mechanical focusing mechanism and/or software focusing modality.
If a high magnification setting is used, the entire spectrum from 430nm to 1100nm can be controlled to be below the depth of focus in accordance with certain embodiments when taking similar microscopy images. When using a medium to low magnification setting, it is possible to correct for near infrared light to be less than twice the depth of focus, according to some embodiments.
In addition, in some advantageous embodiments, assembly time adjustments to the wavelength focal length of the system are provided. This adjustment by suitable coated glass advantageously provides the short wave infrared wavelengths (SWIR) set forth herein from 900-1700nm while encompassing the extended zoom range according to certain embodiments. The wavelength may be corrected to be below the depth of focus when the highest magnification setting is employed throughout the spectral range in some embodiments. In some embodiments, from 975nm to 1700nm, the depth of focus may be less than 975m and may be less than 2 times the depth of focus at the intermediate magnification position. In some embodiments, the lowest magnification setting, from 1065-1660nm, may be less than the depth of focus of the axial chromatic defocus, and may be less than twice the depth of focus outside these values in the short-wave infrared wavelength range.
Lens accessory module
Further specific embodiments of the lens attachment module G1A or otherwise for the first objective lens, pre-objective lens or objective lens module may include or otherwise be configured in accordance with one or more of the following features.
In some embodiments, a variety of long working distances, fixed focal lengths, objective lenses with external entrance pupils are provided. Such an entrance pupil may be placed at a suitable depth to satisfy a sufficient pupil depth and range of movement of the afocal lens to provide a pupil that matches the afocal lens, and thus may operate seamlessly with a focusing module configured in accordance with certain embodiments. In some embodiments, the objective lens may have an entrance pupil of 16-25 mm. Such a pupil may be placed at a distance of 50,75,100,150mm or even more from the outside of the lens.
Some embodiments are employed including the first 5 examples of objectives, indicated digitally in table 8, with a mechanical working distance (w.d.) to focal length (F1) ratio of 0.75 or more (w.d./F1 > 0.75). Alternative embodiments may have a working distance to focal length ratio of between 0.6 and 0.75. Other ratios of working distance to focal length ratios are possible for some embodiments for cost or performance reasons. In certain embodiments, the working distance in combination with the large entrance pupil provides significant numerical aperture performance advantages for a variety of long working distance applications including, but not limited to, inspection lines, contact probes, cavity inspection, automotive component and/or flat panel manufacturing.
Examples given in table 8 include lens attachments and/or objectives with large working distances/focal length ratios and in some embodiments, 16-25mm diameter external entrance pupils at 50,75,100,150mm or more.
The objective lens according to some embodiments may have an angular output that, in combination with a pupil of 16-25mm, exhibits a value of 1.15-4.65mm 2 Etendue of sr.
Other lens attachment and/or objective lens module examples may include telecentric lens attachment with a primary beam having a deviation of less than 2 °,1 °, 0.5 °, or 0.25 ° from the normal to the planar object over the entire field of view and over the entire zoom range in some embodiments. Pupil support for example reduced afocal lenses according to the lens patterns given in the side views in fig. 7-12 and/or the numerical values given in tables 2-7 support main beam angle reduction in lens accessory designs according to some embodiments.
The examples of limited yoke optical components illustrated in fig. 5A, 5B and 6 each contain an example of a lens accessory module G1A. 17-18 illustrate by way of illustration an alternative embodiment of a lens accessory module G1A. Tables 13-14 contain examples of optical indices for lens accessory module G1A of FIGS. 17-18, respectively.
DOF = ±λ/(2×na) according to Rayleigh standard 2 ) Other lens attachments for use with one or more other modules can employ a depth of focus difference of less than 3x, 2x, or even less than 1x or less, starting from a nominal center wavelength of the entire wavelength range, with the ability to focus 400nm-1100 nm.
Additionally, in some embodiments, lenses used with one or more other modules may be configured to operate with a depth of focus difference similar to 3x, 2x, or even less than 1x or less, for example, as per the near field diffraction limit from 900-1700 nm: in some embodiments, refocusing is not required in the band range.
Rear adapter module
Further embodiments of the rear adapter G5B, or the cannula lens, rear module or third module, may include one or more of the following features.
In some embodiments, a variety of short back focus, fixed focal length, cannula lenses are provided with an external entrance pupil, a sufficiently large aperture, and a acceptance angle to produce 1.15-4.65mm 2 Etendue of sr. Such an entrance pupil may be at a sufficient depth of focus to satisfy a sufficient pupil depth and range of motion of an afocal lens module according to some embodiments to provide a pupil that matches the afocal lens module, and thus may work with a focus module seamlessly. In certain embodiments, the varying pupil depth is advantageously optimized to provide advantageous rigidity for use with a stand-alone cannula lens.
A ferrule lens according to some embodiments may have an entrance pupil diameter for an external entrance pupil ferrule lens between 16-25mm in some embodiments.
The cannula lens in some embodiments may receive a maximum collimation field angle of 2.5-3.5 deg. without halation at 50,75,100,150mm, or greater entrance pupil depths, which may provide advantageous field coverage for existing sensor platforms for each given focal length.
Specific embodiments comprising values according to the first and/or second examples above, provide values of etendue of 1.15-4.65mm 2 Between sr. Table 8 shows compliance with 1.58mm for selection 2 The etendue value of sr changes the value of a particular embodiment of the sensor coverage. Table 9 shows that the external entrance pupil having a short optical path/focal length ratio and a diameter of 16-25mm is placed at a distance of 50,75,100,150mm, or more, and the etendue is 1.58mm 2 A rear adapter for sr, or some numerical example of a specific embodiment of a ferrule lens.
In fig. 13, an example of a sleeve lens is illustrated by way of illustration, which may be in accordance with the limited yoke of fig. 5A-5BThe optical arrangement of the module 3 from the optical component may have a distance of 1.58mm 2 The etendue of sr has a number of example variables, as listed in table 9, dimension a or focal length, dimension B or optical path, dimension C or sensor diagonal length.
In fig. 5A, 5B and 6, illustrative examples of limited yoke optical components each include an example of a rear adapter module G5B. In fig. 14-16, alternative embodiments of the rear adapter module G5B are illustrated by way of example. Tables 10-12 contain examples of optical metrics for the rear adapter module G5B of FIGS. 14-16, respectively.
In some embodiments, the cannula lens may have a trajectory or optical path that is smaller than the focal length of the cannula lens. The trajectory or optical path of certain embodiments is determined from the mechanical entrance of the ferrule lens to the focal plane of the ferrule lens, especially when a collimated light beam is input. In other embodiments, the track or optical path to focal length ratio may be less than 0.9. In table 9, parameter values for a number of examples according to these embodiments are included. In fig. 13, the focal length dimension a, the optical path dimension B, and the sensor specification dimension C are graphically presented, and these specific example values can be found in a plurality of examples in table 9.
In addition, DOF = ±λ/(2×na) according to Rayleigh standard 2 ) A ferrule lens according to some embodiments may be configured to have the ability to focus 400nm-1100nm with a depth of focus difference of less than 3x, 2x, or even less than 1x or less, starting from a nominal center wavelength of the entire wavelength range.
In addition, in some embodiments, the lens may be configured to operate with a depth of focus difference similar to 3x, 2x, or even less than 1x or less, at near field diffraction limits from 900-1700nm, without refocusing in the band range.
Although the drawings and specific embodiments of the invention have been described and illustrated, it should be understood that the scope of the invention is not limited to the specific embodiments discussed. Accordingly, the particular embodiments are to be regarded as illustrative rather than restrictive, and it is understood that variations may be made in those particular embodiments by those skilled in the art without departing from the scope of the invention.
For example: particular embodiments may include having near field diffraction limited properties and various particular etendue values of 0.5-1, 1-5, and/or 0.5-5mm 2 Between sr, lens components for a limited yoke system. Alternative embodiments may include a different number of parallel pitches occurring consecutively between the group G1A and G1B shots. There are also different numbers of parallel pitches between the shots of groups G5A and G5B. Lens accessory modules according to some alternative embodiments may include one or more positive and/or negative sets. The rear adapter module in accordance with certain alternative embodiments may include one or more positive or negative sets.
Additionally, in the method employed in accordance with the preferred embodiments herein and as already described above, the operations have been described in a selected printing sequence. However, the order and arrangement is selected for convenience of programming and is not meant to imply any particular order of performing the operations, unless a particular order is specified or a particular order may be deemed desirable by one of ordinary skill in the art.
In the foregoing specification, a group of items linked with the conjunction "and" should not be construed as requiring that each of these items be present in the group in accordance with all embodiments, as one or more components of the various embodiments may be replaced with one or more other embodiments. Furthermore, although items, elements or components of the invention may be described or claimed in the singular, the plural is contemplated to be within the scope of the invention unless limitation to the singular is explicitly stated or if desired to be clearly understood by one of ordinary skill in the art.
In some cases, if words and phrases of word sense expansion, such as "one or more," "at least," "but not limited to," or other phrases, occur, it should not be understood to mean that the scope is reduced if such expansion phrases are not present. The use of the terms "camera," "optical component," "module," and "lens group" should not imply that the components or functionality described or presented in the example claims are all integrally configured together as a single piece of camera, assembly, module, or lens group. In fact, any or all of the various components of a camera (e.g., optical assemblies and image sensors), optical assemblies (e.g., modules 1,2 and 3 and/or lens groups G1, G1A, G1B, G2, G3, G4, G5, G5B, and/or G5B), a module and/or a lens group may be combined together in a single package, possibly separately placed or maintained, and possibly further manufactured, assembled and/or distributed at or through multiple locations.
It is possible to use different materials to make the lenses of the optical components of several specific embodiments. For example, various glass and/or transparent plastics or polymeric materials may also be used, and are not limited to those identified in the optical index table examples, as identified in column 5 on the left of table 1, and columns 4 and 5 on the left of tables 2-7 and tables 10-14. Examples include polyimide. Among these, the polymeric material is a High Refractive Index Polymer (HRIP) having a refractive index generally higher than 1.5 (see, e.g., hung-JuYen and Guey-shaping Liou (2010)). "method of readily obtaining optically isotropic, colorless, thermoplastic polyimide materials with high refractive index" J.Mater. Chem.20 (20): 4080; H.Althues, J.Henle and s.kaskel (2007). "functional inorganic nanofiller for transparent polymers" chemical society, 9 th edition (49): 1454-65; akhmad Herman Yuwono Binghai Liu, junmin Xue, john Wang, hendry Izaac Elim, wei Ji, yeng Li and Timothy John White (2004). "control the crystallinity and nonlinear optical properties of transparent nanocomposite TiO 2-PMMA" J.Mater.chem.14 (20): 2978; naoaki Suzuki, yasuo Tomita, kentaroh Ohmori, motohiko Hidaka and Katsumi Chikama (2006). "high transparency zirconia nanoparticle dispersed acrylic photopolymer for volume holographic recording", optical publication 14 (26): 012712, which is incorporated herein by reference.
According to certain embodiments, optical image stabilization techniques may also be incorporated into microscopes and/or digital cameras and/or video cameras. For example, the techniques described in 8,649,628,8,649,627,8,417,055,8,351,726,8,264,576,8,212,882,8,593,542,8,509,496,8,363,085,8,330,831,8,648,959,8,637,961,8,587,666,8,604,663,8,521,017,8,508,652,8,358,925,8,264,576,8,199,222,8,135,184,8,184,967, and U.S. published patent application numbers 2012/0121243,2012/0207347,2012/0206618,2013/0258140,2013/0201392,2013/0077945,2013/0076919,2013/0070126,2012/0019613,2012/0120283, and 2013/007537, which are incorporated herein by reference, may also be used.
In addition, various embodiments presented herein are presented in the drawings and other figures. It will be apparent to one having ordinary skill in the art, after reading this disclosure, that the particular embodiments presented, as well as various alternative examples thereof, may be practiced without limitation to the examples illustrated. For example, the schematic drawings and their accompanying description should not be construed to prescribe a particular structure or configuration.
Various specific embodiments of the optical assembly are described by way of technical specifications, drawings and tabular illustrations. Microscopes and digital cameras as well as video cameras as well as other mobile or laboratory equipment or research equipment or optical systems according to further embodiments may contain optical components therein. Several examples of cameras that can be manufactured with high efficiency include image sensor modules that are combined with optical components according to particular embodiments described herein. Certain optical parts of a camera or optical assembly, such as one or more lenses, mirrors and/or apertures, shutters, housings or barrels to which certain optical elements are secured, lenses or barrels, or other optical lenses, such as lenses, light sources, auxiliary sensors, accelerometers, gyroscopes, power connections, data storage chips, microprocessors, wired or wireless transmission/reception connections and/or receivers/transmitters, or such structures in housing pairs and/or connection pins or recesses or other such structures that may be included in certain embodiments, even though they are not specifically described or graphically represented herein. It is noted that in some embodiments, one shutter may be included, while other camera embodiments do not. Flash may or may not be included in these camera embodiments.
In some embodiments, it may be desirable to have a significantly wider field of view in one dimension than in another, and it may be desirable to have a wide field of view in only one dimension. In this case, some of the principles described herein may be simplified to apply cylindrical surfaces to the provided spherical examples.
Furthermore, all references and brief descriptions of products, backgrounds, abstracts, tables, and graphs cited above and below are incorporated by reference in their entirety into the detailed description as alternatives to the specific embodiments. Several specific embodiments of microscopes, optical assemblies, and cameras have been described herein by physical, electrical, and optical construction and are illustrated by way of example. Particular embodiments of microscopes, optical assemblies, other features of cameras, and components that are encompassed within the scope of alternative embodiments may be described in one or a combination of several of U.S. patent nos. 7,224,056,7,683,468,7,936,062,7,935,568,7,927,070,7,858,445,7,807,508,7,569,424,7,449,779,7,443,597,7,449,779,7,768,574,7,593,636,7,566,853,7,858,445,7,936,062,9,091,843,9,316,808,8,005,268,8,014,662,8,090,252,8,004,780,8,119,516,7,920,163,7,747,155,7,368,695,7,095,054,6,888,168,6,844,991,6,583,444, and/or 5,882,221, and U.S. published patent application No. 2013/0270419,2013/0258140,2014/0028887,2014/0043525,2012/0063761,2011/0317013,2011/0255182,2011/0274423,2010/0053407,2009/0212381,2009/0023249,2008/0296717,2008/0099907,2008/0099900,2008/0029879,2007/0190747,2007/0190691,2007/0145564,2007/0138644,2007/0096312,2007/0096311,2007/0096295,2005/0095835,2005/0087861,2005/0085016,2005/0082654,2005/0082653, and/or 2005/0067688. All of these patents and published patent applications are incorporated by reference herein.
U.S. patent nos. 7,593,636,7,768,574,7,807,508 and 7,244,056, which are incorporated by reference, describe examples of structures in which some camera devices are embedded within the optical height in order to reduce the physical height. In alternative embodiments, an advantageous compact optical assembly or module or lens set thereof, a microscope and camera, and video camera and other mobile devices and laboratory and research equipment are provided. Also provided herein are optical assemblies and microscopes, as well as imaging systems and cameras, that advantageously provide a low optical path (or profile or height) to effective focal length (or profile or height) ratio, or a favorable TTL/EFL ratio.
US 2013/024380, also incorporated by reference, describes an example of an imaging system comprising optical components and sensors and a camera module placed inside a waterproof cabin. Also provided are mechanisms for wireless communication of optical and/or electrical and/or image data that do not involve a watertight sealed housing having one or more imaging components inside.
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Claims (10)
1. A limited yoke optical assembly for viewing or inspecting an object, or for forming with a lens, lens group or other optical component or at least as part complement a set of optical imaging systems, characterized by:
(1) The device comprises a core zooming module, wherein the core zooming module consists of five optical lens groups, and the positive and negative diopter of each optical lens group and whether the optical lens group is active or not are as follows:
a) The core zooming module sequentially comprises a static positive film group, a negative film active group, a positive film active group, a negative film active group and a static positive film group from the object side to the image side of the optical component;
b) The core zooming module sequentially comprises a static positive film group, a negative film movable group, a static positive film group, a negative film movable group and a static positive film group from the object side to the image side of the optical component;
c) The core zooming module sequentially comprises a static positive film group, a negative film active group and a static positive film group from the object side to the image side of the optical component;
and configured to provide an afocal lens having a zoom ratio of at least 7:1;
the lens accessory module is arranged on the object side of the core zooming module;
the lens accessory module comprises a positive focal length lens group;
the device further comprises a rear adapter module arranged on the image side of the core zoom module;
the rear adapter module comprises a positive focal length lens group; the rear adapter module further comprises a sleeve lens;
(2) The optical component has an etendue of between 1.15 and 4.65mm2 sr;
(3) The zoom ratio is between 5.5:1 and 16:1.
2. The optical assembly of claim 1, wherein the optical assembly is configured for use with an image sensor, the image sensor being between 8MP and 32 MP.
3. The optical assembly of claim 1, comprising a lighting module, a motorized module, a stationary module, or one or more focusing modules or a combination of these modules.
4. The optical assembly of claim 1 having a magnification of 2X or a magnification above 2X at the high magnification location.
5. The optical assembly of claim 1, wherein the optical assembly has an etendue of not less than 1.57mm2sr in the low magnification position.
6. The optical assembly of claim 1, wherein the optical assembly has an etendue of not less than 1.58mm in the low magnification position 2 sr。
7. A limited yoke camera comprising:
the limited yoke optical assembly of any one of claims 1-6;
an image sensor for capturing an image located on the optical assembly.
8. The limited yoke camera of claim 7 including a digital microscope.
9. A limited yoke camera comprising:
a finite yoke optical assembly as claimed in any one of claims 1 to 6;
an eyepiece is positioned and configured such that an image formed by the optical assembly is viewable through the eyepiece.
10. The limited yoke camera of claim 9 including a microscope.
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| CN202110812315.6A CN113359283B (en) | 2017-01-26 | 2018-01-25 | High-optical-expansion modularized zoom lens for machine vision |
| CN201810074685.2A CN110082895B (en) | 2017-01-26 | 2018-01-25 | Modular zoom lens with high optical expansion for machine vision |
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| CN202110812719.5A Pending CN113359285A (en) | 2017-01-26 | 2018-01-25 | Modular zoom lens with high optical expansion for machine vision |
| CN202110812685.XA Pending CN113359284A (en) | 2017-01-26 | 2018-01-25 | Modular zoom lens with high optical expansion for machine vision |
| CN202110812278.9A Pending CN113485004A (en) | 2017-01-26 | 2018-01-25 | Modular zoom lens with high optical expansion for machine vision |
| CN202110812741.XA Pending CN113485005A (en) | 2017-01-26 | 2018-01-25 | Modular zoom lens with high optical expansion for machine vision |
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| CN202110812685.XA Pending CN113359284A (en) | 2017-01-26 | 2018-01-25 | Modular zoom lens with high optical expansion for machine vision |
| CN202110812278.9A Pending CN113485004A (en) | 2017-01-26 | 2018-01-25 | Modular zoom lens with high optical expansion for machine vision |
| CN202110812741.XA Pending CN113485005A (en) | 2017-01-26 | 2018-01-25 | Modular zoom lens with high optical expansion for machine vision |
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| US10678032B2 (en) | 2017-01-26 | 2020-06-09 | Navitar, Inc. | High etendue modular zoom lens for machine vision having five lens groups |
| CN108427188A (en) * | 2017-01-27 | 2018-08-21 | 美国奈维特公司 | For the high etendue modularization zoom lens of machine vision |
| CN114518217B (en) * | 2021-12-31 | 2024-03-26 | 深圳市瑞图生物技术有限公司 | Method for determining center distance between lenses, microscope control device, and storage medium |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005091755A (en) * | 2003-09-17 | 2005-04-07 | Olympus Corp | Afocal zoom lens for microscope |
| CN102053345A (en) * | 2009-11-04 | 2011-05-11 | 株式会社尼康 | Zoom optical system, optical apparatus and method for manufacturing zoom optical system |
| CN103616759A (en) * | 2013-12-07 | 2014-03-05 | 梧州奥卡光学仪器有限公司 | Optical zoom system of microscope |
| JP2015084037A (en) * | 2013-10-25 | 2015-04-30 | 株式会社ニコン | Variable power optical system, optical device, and method for manufacturing variable power optical system |
Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE10222041B4 (en) * | 2002-05-10 | 2006-01-26 | Leica Microsystems (Schweiz) Ag | Afocal zoom system for use in microscopes |
| DE20207780U1 (en) * | 2002-05-10 | 2002-08-22 | Leica Microsystems | Afocal zoom for use in microscopes |
| DE10225192B4 (en) * | 2002-06-06 | 2004-09-09 | Leica Microsystems (Schweiz) Ag | Objective for stereomicroscopes of the telescope type and stereomicroscope with such an objective |
| DE10359733A1 (en) * | 2003-12-19 | 2005-07-14 | Carl Zeiss Jena Gmbh | Afocal zoom system |
| JP5387409B2 (en) * | 2007-09-04 | 2014-01-15 | 株式会社ニコン | Relay variable power optical system and microscope having the same |
| JP2010060920A (en) * | 2008-09-04 | 2010-03-18 | Olympus Corp | Objective optical system and microscope with the same |
| DE102010045860B4 (en) * | 2010-09-17 | 2019-05-09 | Carl Zeiss Microscopy Gmbh | Zoom system of high spread |
| DE102012223712A1 (en) * | 2012-12-19 | 2014-06-26 | Carl Zeiss Microscopy Gmbh | VARIABLE PICTURE SYSTEM WITH LENS FIXED |
-
2018
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Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005091755A (en) * | 2003-09-17 | 2005-04-07 | Olympus Corp | Afocal zoom lens for microscope |
| CN102053345A (en) * | 2009-11-04 | 2011-05-11 | 株式会社尼康 | Zoom optical system, optical apparatus and method for manufacturing zoom optical system |
| JP2015084037A (en) * | 2013-10-25 | 2015-04-30 | 株式会社ニコン | Variable power optical system, optical device, and method for manufacturing variable power optical system |
| CN103616759A (en) * | 2013-12-07 | 2014-03-05 | 梧州奥卡光学仪器有限公司 | Optical zoom system of microscope |
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| CN110082895B (en) | 2021-11-19 |
| CN113359284A (en) | 2021-09-07 |
| CN113359285A (en) | 2021-09-07 |
| CN113485004A (en) | 2021-10-08 |
| CN115561887A (en) | 2023-01-03 |
| CN113359283A (en) | 2021-09-07 |
| CN113485005A (en) | 2021-10-08 |
| CN110082895A (en) | 2019-08-02 |
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