SYSTEM AND METHOD FOR DETERMINING PROBLEMS WITH OPTICAL COMPONENTS - Patent application

Abstract

The present disclosure provides a system capable of providing a plurality of first portions of a laser beam to an objective lens of an optical system, the objective lens providing the plurality of first portions of the laser beam to each of a plurality of locations on a test surface, the objective lens receiving a plurality of second portions of the laser beam from the test surface, determining a plurality of intensities each associated with a plurality of second portions of the laser beam, converting the plurality of intensities into data representing a plurality of measurements of the plurality of intensities, determining from the data whether intensity values ​​of the plurality of intensities are less than an intensity threshold, and providing information indicating a problem with the objective lens if the intensity is less than the intensity threshold, and providing information indicating no problem with the objective lens if the intensity is not less than the intensity threshold.

Description

[Technical field]

[0001] FIELD OF THE DISCLOSURE This disclosure relates to determining whether an optical unit should be replaced or repaired, and more particularly to using the intensity of reflected light from a test surface to determine whether an optical unit should be replaced or repaired. [Background technology]

[0002] Traditionally, determining the quality of a composite optical unit, such as an F-theta lens, was not possible without specialized and expensive measurement equipment. These specialized measurement equipment were typically available from the manufacturer of the composite optical unit. An example of a specialized measurement equipment capable of determining the quality of a composite optical unit is a wavefront sensor. For example, a wavefront sensor may be designed specifically for the parameters of the composite optical unit. A specialized measurement equipment may provide detailed information that is not necessary to determine whether the composite optical unit should be replaced during final assembly of the equipment or during customer service operations. Without the need for such unnecessary information, one or more other systems, one or more processes, and / or one or more methods may be implemented to determine whether the composite optical unit should be replaced. Summary of the Invention [Means for solving the problem]

[0003] The present disclosure provides a system capable of providing a plurality of first portions of a laser beam to an objective lens of an optical system, capable of providing a plurality of first portions of the laser beam to each of a plurality of locations on a test surface, capable of receiving a plurality of second portions of the laser beam from the test surface, capable of providing the plurality of second portions of the laser beam to a two-photon absorption (TPA) detector, capable of determining a plurality of intensities each associated with a plurality of second portions of the laser beam, capable of converting the plurality of intensities into data representative of a plurality of measurements of the plurality of intensities, capable of determining from the data whether an intensity value of the plurality of intensities is less than an intensity threshold, capable of providing information indicative of no problem with the objective lens if the intensity value of the plurality of intensities is not less than the intensity threshold, and capable of providing information indicative of a problem with the objective lens if the intensity value of the plurality of intensities is less than the intensity threshold. For example, the problem with the objective lens may be an optical aberration.

[0004] The system may include a laser that generates a laser beam. The system may include a biometric device that may include an optical system. The optical system may include at least one mirror. For example, the system may further adjust the at least one mirror to provide a plurality of first portions of the laser beam to each of a plurality of locations on the test surface. The system may include a plurality of lenses different from the objective lens. For example, the system may further adjust the plurality of lenses to expand a diameter of each of the plurality of first portions of the laser beam. The system may include an aperture. For example, the system may further adjust a diameter of an opening of the aperture. The aperture may allow light reflected from the test surface to pass through the opening and block light reflected from the test surface outside the opening. For example, the test surface may be partially reflective.

[0005] The disclosure further includes a non-transitory computer readable memory device having instructions that, when executed by a processor of the system, cause the system to perform the steps described above. The disclosure further includes a system or non-transitory computer readable memory device as described above having one or more of the following features, which may be used in combination with each other unless clearly mutually exclusive: i) providing a plurality of first portions of a laser beam to an objective lens of an optical system; ii) providing a plurality of first portions of the laser beam via the objective lens to each of a plurality of locations on the test surface; iii) receiving a plurality of second portions of the laser beam from the test surface via the objective lens; iv) providing the plurality of second portions of the laser beam to a TPA detector; v) determining a plurality of intensities respectively associated with a plurality of second portions of the laser beam; vi) converting the plurality of intensities into data representative of a plurality of measurements of the plurality of intensities; vii) determining from the data whether an intensity value of the plurality of intensities is below an intensity threshold; viii) providing information indicative of a problem with the objective lens if the intensity value of the plurality of intensities is below the intensity threshold; ix) providing information indicative of no problem with the objective lens if the intensity value of the plurality of intensities is not below the intensity threshold; x) generating a laser beam; xi) adjusting at least one mirror to provide the plurality of first portions of the laser beam to each of a plurality of locations on the test surface; and xii) adjusting a diameter of an aperture of an iris.

[0006] Any of the above-mentioned systems may be capable of performing any of the above-mentioned methods, and any of the above-mentioned non-transitory computer-readable memory devices may be capable of causing a system to perform any of the above-mentioned methods. Any of the above-mentioned methods may be implemented in any of the above-mentioned systems or using any of the above-mentioned non-transitory computer-readable memory devices.

[0007] It should be understood that both the foregoing general description and the following detailed description are exemplary and explanatory in nature and are intended to facilitate understanding of the present disclosure without limiting the scope of the disclosure. In this regard, further aspects, features and advantages of the present disclosure will become apparent to those skilled in the art from the following detailed description.

[0008] For a more complete understanding of the present disclosure and its features and advantages, reference is made to the following description taken in conjunction with the accompanying drawings, which are not drawn to scale. [Brief description of the drawings]

[0009] [Figure 1A] FIG. 1A shows an example of an optical system. [Figure 1B] FIG. 1B shows another example of an optical system. [Figure 2A] FIG. 2A illustrates an example of a medical system. [Figure 2B] FIG. 2B shows an example of a biometric device. [Figure 3A] FIG. 3A illustrates a second example of a medical system. [Figure 3B] FIG. 3B illustrates a third example of a medical system. [Figure 3C] FIG. 3C shows an example of a microscope integrated display and multiple examples of surgical tool setups. [Figure 3D] FIG. 3D illustrates another example of a medical system. [Figure 4] FIG. 4 illustrates an example of a computer system. [Diagram 5] FIG. 5 shows an example of a method for operating the optical system. [Figure 6] FIG. 6 shows an example of a method for determining whether an objective lens has a problem. [Figure 7A] FIG. 7A shows an example of a test surface and multiple locations. [Figure 7B] FIG. 7B shows an example of an objective lens that provides a portion of the laser beam to the test surface. [Figure 7C] FIG. 7C shows an example of an objective lens that receives the portion of the laser beam that is reflected from the test surface. [Figure 7D] FIG. 7D shows another example of an objective lens that provides portions of a laser beam to a test surface. [Figure 7E] FIG. 7E shows a second example of an objective lens that receives a portion of the laser beam reflected from the test surface. [Figure 7F] FIG. 7F shows an example of an aperture and objective lens that provides a portion of the laser beam to a test surface. [Figure 7G] FIG. 7G shows an example of an aperture and objective lens that receives the portion of the laser beam that is reflected from the test surface. [Figure 7H] FIG. 7H shows another example of an aperture and objective lens that provides portions of the laser beam to the test surface. [Figure 7I] FIG. 7I shows an example of an objective lens that receives the portion of the laser beam that is reflected from the test surface and an aperture that blocks the portion of the laser beam. [Figure 7J] FIG. 7J illustrates an example of one or more aberrations of an objective lens that cause the objective lens to focus behind the test surface. [Figure 7K] FIG. 7K shows an example of a reflected portion of a laser beam that does not return along the incident path of the laser beam. [Figure 7L] FIG. 7L illustrates an example of one or more aberrations of an objective lens that cause the objective lens to focus short of the test surface. [Figure 7M] FIG. 7M shows another example of a reflected portion of a laser beam that does not return along the incident path of the laser beam. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0010] In the following description, details are set forth through examples to facilitate discussion of the disclosed subject matter, but it will be apparent to those skilled in the art that the disclosed embodiments are examples only and do not encompass all possible embodiments.

[0011] As used herein, reference numbers refer to a class or type of entity, and the last letter of such reference number refers to a particular instance of a particular entity of that class or type. Thus, for example, a hypothetical entity designated "12A" may refer to a particular instance of a particular class / type, and the reference "12" may refer to the collection of instances of that particular class / type or any one instance of that class / type in general.

[0012] The medical system may be used in performing a medical procedure on a patient. The medical system may include an optical instrument. For example, the medical system may include one or more optical systems including an optical instrument. The optical system may include one or more optical elements. For example, an optical element may be or include an element that controls light (e.g., reflects light, refracts light, filters light, transmits light, polarizes light, etc.). The optical element may be made of any material that controls light as designed. For example, the material may include one or more of glass, quartz, metal, and semiconductor, etc. Examples of optical elements may include one or more of lenses, mirrors, prisms, optical filters, wave guides, wave plates, beam expanders, beam collimators, beam splitters, gratings, and polarizers, etc. Although the optical system may be designed for consistency, the optical system may be tested. For example, the optical system may be periodically tested to determine whether the optical system is functioning according to one or more parameters.

[0013] An optical system can be tested using a surface. For example, the surface may include only slight aberrations. The surface may be configured to emulate an ideal surface. In one example, the aberrations of the surface may result in no false positives when used to test the optical system. In another example, the aberrations of the surface may result in an acceptably large number of false positives when used to test the optical system.

[0014] The optical system may include a two-photon absorption detector. For example, one or more processes and / or one or more methods used to test the optical system may utilize one or more effects of two-photon absorption. During testing, an offset value may be set while performing focus control to characterize the quality of the optical system by the deviation of the offset depth of the reflection from the surface from the expected position. The reflection may be analyzed to determine whether the optical system has any locally definable defects.

[0015] One or more characterizations of a compound optical element, such as an F-theta objective lens, may be possible using one or more systems, one or more processes, and / or one or more methods described herein. For example, one or more characterizations of a compound optical element, such as an F-theta objective lens, may be possible without the use of dedicated and / or expensive measurement equipment, such as a wavefront sensor, which may be specifically designed for a particular parameter of the optical element.

[0016] 1A, an example of an optical system is shown. The optical system 110 can calibrate the position of the focal point of a laser beam directed at a target. For example, the target can be a surface 112. The surface 112 can be referred to as a reference surface. The surface 112 can be referred to as a test surface. The surface 112 can be used to determine whether one or more portions of the optical system 110 can be used in one or more procedures. The surface 112 can be used to determine whether one or more portions of the optical system 110 can be used in one or more medical procedures. For example, if the one or more portions of the optical system 110 are not used in one or more medical procedures, the one or more portions of the optical system 110 can be repaired or replaced. The surface 112 can be a surface of a test material that mimics a site on a patient. The surface 112 can be a surface of a test material that calibrates the optical system 110. The surface 112 can be a surface of a test material that mimics a site on a patient. In one example, surface 112 may be completely reflective. In another example, surface 112 may be partially reflective. As an example, the test material may include polymethylmethacrylate (PMMA). The PMMA may mimic a patient's eye. For example, the PMMA may mimic one or more lights reflected from a patient's eye.

[0017] The optical system 110 may be used in a medical procedure. For example, a medical system may include the optical system 110. The medical procedure may include an ophthalmic procedure on at least a portion of a patient's eye. Although the optical system 110 may be used in a medical system, the optical system 110 may be used in any system. As an example, the optical system 110 may be used in a telescope. The telescope may be a reflecting telescope.

[0018] The optical system 110 may include a number of optical elements. For example, the optical elements may be or include elements that control light (e.g., reflect light, refract light, filter light, transmit light, polarize light, etc.). The optical elements may be made of any material that controls light in a designed manner. For example, the materials may include one or more of glass, quartz, metal, semiconductor, etc. Examples of optical elements may include one or more of lenses, mirrors, prisms, optical filters, wave guides, wave plates, beam expanders, beam collimators, beam splitters, gratings, polarizers, etc.

[0019] As shown, the optical system 110 may include a laser 120. The laser 120 may generate a laser beam. In one example, the laser beam may be a pulsed laser beam. In another example, the laser beam may be a continuous wave laser beam. The laser 120 may be a device that generates a beam of coherent monochromatic light by stimulated emission of photons from excited atoms or molecules. The laser beam may have any suitable wavelength, such as a wavelength in the infrared (IR), visible, or ultraviolet (UV) range. The pulses of the laser beam may have a pulse duration in any suitable range, such as microseconds, nanoseconds, picoseconds, femtoseconds, or attoseconds. The focus of the laser beam may be the focal point of the laser beam. As shown, the optical system may include detection optics 122 and collection optics 140. As shown, the detection optics 122 may include a polarizer 124, a lens 128, a two-photon absorption (TPA) detector 130, and a wave plate 134. Although lens 128 is shown as a single lens, lens 128 may be multiple lenses.

[0020] The polarizer 124 may be an optical filter that transmits light of a certain polarization while reflecting light of other polarizations. The polarizer 124 may filter unsorted or mixed polarized light into a single linearly polarized light. In one example, the polarizer 124 may transmit at least a portion of the laser beam (which may have a first polarization) received from the laser 120 toward the wave plate 134. In another example, the polarizer 124 may reflect at least a portion of the laser beam (which may have a second polarization) received from the wave plate 134 toward the lens 128 and the TPA detector 130. The first polarization may be a linear polarization. The second polarization may be a linear polarization rotated ninety degrees (90°). The lens 128 may focus the beam from the polarizer 124 to the TPA detector 130. For example, the TPA detector 130 may be located at the focal plane of the lens 128. The lens 128 may be an achromatic lens. For example, lens 128 may be configured to limit the effects of one or more chromatic aberrations and / or one or more spherical aberrations, etc.

[0021] The wave plate 134 may be an optical element that converts the polarization of light passing through it. The wave plate 134 may be any suitable wave plate, such as a quarter wave plate that converts linearly polarized light to circularly polarized light or vice versa, or a combination of a half wave plate (that can rotate linearly polarized light by forty-five degrees (45°)) and a forty-five degree (45°) Faraday rotator (also known as a photodiode when used in combination with the polarizer 124). The wave plate 134 may be a quarter wave plate that can receive the first linearly polarized laser beam from the polarizer 124. The wave plate 134 can convert the laser beam from the first linear polarization to circular polarization. The wave plate 134 can direct the laser beam to the collection optics 140. The wave plate 134 can receive at least a reflected portion of the laser beam from the collection optics 140. The waveplate 134 can convert at least the reflected portion of the laser beam from the collection optics 140 from a circular polarization to a second linear polarization that is rotated relative to the first linear polarization. The waveplate 134 can transform the original linear polarization of the laser beam by ninety degrees (90°).

[0022] The wave plate 134 may include a combination of a half-wave plate and a Faraday rotator. The wave plate 134 may receive the first linearly polarized laser beam from the polarizer 124. In this orientation, the half-wave plate and the Faraday rotator may compensate each other's rotation effect, resulting in a rotation of the laser beam of zero degrees (0°). The wave plate 134 may then direct the laser beam to the focusing optics 140. The wave plate 134 may also receive at least a reflected portion of the laser beam reflected from the focusing optics 140. In this orientation, the half-wave plate and the Faraday rotator may add a rotation effect, resulting in a rotation of the laser beam of ninety degrees (90°), which may be a second linear polarization rotated relative to the first linear polarization. For example, a laser beam may pass through a waveplate 134 that can rotate the beam by zero degrees (0°) and be reflected back through a waveplate 134 that can rotate the beam by ninety degrees (90°), resulting in the laser beam being changed ninety degrees (90°) from its original linear polarization. The waveplate 134 may be reconfigured such that a laser beam passes through a waveplate 134 that can rotate the beam by ninety degrees (90°) and is reflected back through a waveplate 134 that can rotate the beam by zero degrees (0°).

[0023] Although not specifically shown, the optical system 110 need not include the wave plate 134. For example, the polarizer 124 can be replaced by a partially reflective mirror. Although not specifically shown, the sensing optics 122 can be disposed between the beam expander 141 and the scanner 144.

[0024] As shown, collection optics 140 may include a beam expander 141, a scanner 144, and an objective lens 148. The objective lens 148 may include multiple lenses. In one example, the objective lens 148 may be or include a compound lens. In another example, the objective lens 148 may be or include an F-theta lens. As shown, the beam expander 141 may include lenses 142A, 142B. Although the beam expander 141 is shown to include two lenses, the beam expander 141 may include any number of lenses.

[0025] The direction of the laser beam may become parallel to the Z axis as the laser beam approaches the surface 112. The surface 112 may be parallel to the X axis and perpendicular to the Z axis. Although the Y axis is not specifically shown, the Y axis may be perpendicular to the X axis and the Z axis. For example, the Y axis may be perpendicular to a plane that includes the X axis and the Z axis. The direction of the laser beam may not become parallel to the Z axis as the laser beam approaches the surface 112. For example, due to a problem with the objective lens 148, the direction of the laser beam may not become parallel to the Z axis as the laser beam approaches the surface 112.

[0026] The focusing optics 140 can direct and / or focus the laser beam on the surface 112. The focusing optics 140 can direct the focal point of the laser beam along the Z axis to the surface 112 and receive at least a portion of the beam reflected by the surface 112. Optical elements such as lens 142A and / or mirrors can control the Z position of the focal point of the laser beam. Another optical element such as lens 142B (e.g., in combination with lens 142A) can expand the diameter of the laser beam. In one example, the beam expander 141 can be configured to consistently control the focal point of the laser beam. In another example, the optics can be changed over time such that the Z position of the focal point changes. One or more calibrations of the Z position of the focal point of the laser beam can be measured from time to time.

[0027] The scanner 144 may include one or more optical elements capable of controlling the direction of the laser beam to control the XY position of the focal spot. To bend the laser beam laterally, the scanner 144 may include a pair of galvanometrically actuated scanner mirrors tilted about mutually perpendicular axes. The scanner 144 may receive the laser beam from the beam expander 141. The scanner 144 may steer the laser beam to control the XY position of the focal spot. The objective lens 148 may receive the laser beam from the scanner 144. The objective lens 148 may direct the beam onto the surface 112.

[0028] The interface 114 can stabilize the position of the surface 112 relative to the optical system 110. For example, the interface 114 can be made of one or more rigid materials (e.g., plastic, glass, metal, etc.). The interface 114 can be a patient interface 114. For example, the patient interface 114 can shape (e.g., flatten or otherwise deform) the eye or a surface of the eye. The "target" surface of the patient interface 114 can be a surface of the interface 114 designed to face (and even contact) the eye. The patient interface 114 can be a disposable product. For example, the patient interface 114 can be discarded after being used on a patient's eye. Multiple patient interfaces 114 can be configured to have a fixed length in the Z direction. Multiple patient interfaces 114 can each have a different length. A calibration of the Z position of a point relative to a particular interface 114 can be performed.

[0029] As shown, the optical system 110 may include a computer system 152. The computer system 152 may execute instructions that implement at least a portion of one or more of the systems, one or more flow diagrams, one or more processes, and / or one or more methods described herein. Although the optical system 110 is shown as including the computer system 152, the optical system 110 does not have to include the computer system 152. For example, the computer system 152 may be external to the optical system 110. The computer system 152 may be communicatively coupled to the optical system 110.

[0030] The collection optics 140 can direct the laser beam to the surface 112. For example, the surface 112 can be disposed at the end of the interface 114. The surface 112 can reflect the laser beam. The surface 112 can reflect at least a portion of the laser beam. The detection optics 122 can direct at least a portion of the laser beam to the TPA detector 130. For example, the TPA detector 130 can convert an intensity of at least a portion of the laser beam into digital data. The digital data can be representative of the intensity of at least a portion of the laser beam. The TPA detector 130 can provide the digital data to the computer system 152.

[0031] At least a portion of the laser beam undergoes two-photon absorption that can excite electrons that can generate a signal in response to the intensity of the incident light. The signal can indicate the proximity of the focal point of the laser beam to the surface 112. In one example, the further the focal point is from the surface 112, the lower the intensity of the beam at the partial TPA detector 130. In a second example, the larger the diameter of at least a portion of the laser beam, the lower the intensity of the beam at the partial TPA detector 130. In a third example, the closer the focal point is to the surface 112, the higher the intensity of the beam at the partial TPA detector 130. In a fourth example, the smaller the diameter of at least a portion of the laser beam, the higher the intensity of the beam at the partial TPA detector 130. In another example, when the focal point is at the surface 112, the diameter at the TPA detector 130 can be smallest and the intensity can be greatest.

[0032] As shown, computer system 152 may be communicatively coupled to TPA detector 130. As shown, computer system 152 may be communicatively coupled to laser 120. As shown, computer system 152 may be communicatively coupled to beam expander 141. As shown, computer system 152 may be communicatively coupled to scanner 144. In one example, computer system 152 may receive information from one or more of laser 120, TPA detector 130, beam expander 141, scanner 144, etc. In another example, computer system 152 may provide information to one or more of laser 120, TPA detector 130, beam expander 141, scanner 144, etc. Computer system 152 may provide control information to one or more of laser 120, TPA detector 130, beam expander 141, scanner 144, etc.

[0033] The computer system 152 can determine whether the focus of the laser beam is calibrated in response to the intensity measurements from the TPA detector 130. The computer system 152 can determine whether the intensity is at a maximum intensity. The maximum intensity may be the maximum of the intensities that may be measured at different positions of the focus. The maximum intensity may be measured or calculated prior to the calibration session, so that the computer system 152 can determine whether the intensity measured during the calibration session is at a maximum. If the intensity is at a maximum intensity, the computer system 152 can determine that the focus is at the surface 112. If the intensity is not at a maximum intensity, the computer system 152 can adjust the collection optics 140 to direct the focus to a different point on the Z-axis. The computer system 152 generates a graph from the one or more TPA detector signals, which may represent the intensity of at least a portion of the laser beam. For example, the one or more TPA detector signals may be or include data.

[0034] 1B, another example of an optical system is shown. As shown, the optical system 110 may include an aperture 160. As shown, the aperture 160 may include an aperture 162. As shown, a computer system 152 may be communicatively coupled to the aperture 160. The computer system 152 may provide control information to the aperture 160, etc. For example, the computer system 152 may provide control information to the aperture 160 indicating a diameter of the aperture 162. The diameter of the aperture 162 may be large enough to allow light to pass through the aperture 160. For example, the aperture 160 may prevent light from passing through one or more areas of the aperture 160 other than the aperture 162. Although not specifically shown, the computer system 152 may not be communicatively coupled to the aperture 160. In one example, the diameter of the aperture 162 may be fixed. In another example, the diameter of the aperture 162 may be manually adjustable.

[0035] 2A, an example of a medical system is shown. As shown, the medical system 210 may be used with a patient 220. As shown, the medical system 210 may include a computer system 212. The computer system 212 may be communicatively coupled to displays 216A, 216B. The computer system 212 may be communicatively coupled to a biometric device 214. In one example, the biometric device 214 may include one or more cameras. In another example, the biometric device 214 may include a three-dimensional scanner. The biometric device 214 may be used for biometric measurements of an eye 222 of a patient 220. As shown, the display 216A may display an image 230A associated with the eye 222 of the patient 220. As shown, the display 216B may display an image 230B associated with the eye 222 of the patient 220.

[0036] The computer system 212 can determine eye recognition information. For example, the eye recognition information may include biometric information associated with the eye 222 of the patient 220. The biometric information associated with the eye 222 may include one or more of a blood vessel pattern of the sclera of the eye 222, an iris structure of the eye 222, a position of the iris structure of the eye 222, a distance measurement of the cornea of ​​the eye 222 to the lens of the eye 222, a distance measurement of the lens of the eye 222 to the retina of the eye 222, a corneal shape of the eye 222, a retinal pattern of the eye 222, and a wavefront measurement, etc.

[0037] As shown, the display 216B can show display areas 236A-236D. In one example, the display area 236 can show a distance measurement of the cornea of ​​the eye 222 to the lens of the eye 222, a distance measurement of the lens of the eye 222 to the retina of the eye 222, a location of a structure of the iris 234, corneal shape information, or wavefront measurement information, among other biometric information associated with the eye 222. In another example, the display area 236 can show any information associated with the patient 220.

[0038] A person 250 may operate the medical system 210. For example, the person 250 may be a medical professional. The person 250 may input identifying information associated with the patient 220 into the computer system 212. The identifying information associated with the patient 220 may include one or more of the following: the name of the patient 220, the address of the patient 220, the telephone number of the patient 220, the government issued identification number of the patient 220, the government issued identification code of the patient 220, and the date of birth of the patient 220, etc.

[0039] The person 250 can provide medical procedure information associated with the patient 220 to the computer system 212. The medical procedure information can be associated with a medical procedure. The medical procedure information can be relevant identifying information associated with the patient 220. The computer system 212 can store the medical procedure information. For example, the computer system 212 can store the medical procedure information for later use. The medical procedure information can be associated with a surgical procedure. For example, the medical procedure information can be obtained before a surgical procedure. The medical procedure information can be used during the medical procedure. For example, the medical procedure can include a surgical procedure.

[0040] 2B, an example of a biometric device is shown. As shown, the biometric device 214 may include image sensors 260A-260C. For example, the image sensor 260 may include a camera. The camera may include one or more digital image sensors. In one example, the digital image sensor may include a charge-coupled device (CCD). In another example, the digital image sensor may include a complementary metal-oxide semiconductor (CMOS). The camera may convert light into digital data. The camera may use a Bayer filter mosaic. For example, the camera may use a Bayer filter mosaic in combination with an optical anti-aliasing filter. The combination of the Bayer filter mosaic in combination with the optical anti-aliasing filter may reduce aliasing due to reduced sampling of different primary color images. The camera may use a demosaicing process. For example, the demosaicing process may be used to create a complete array of red, green, and blue (RGB) image data by interpolating color information.

[0041] As shown, the biometric device 214 may include light projectors 262A-C. In one example, the light projector 262 may project visible light. In another example, the light projector 262 may project infrared light. The light projector 262 may project a circle and / or a dot onto the patient's eye. The image sensor 260 may receive a reflection of the projected circle and / or dot onto the patient's eye. The computer system may determine one or more locations and / or one or more templates associated with the patient's eye based at least on the reflection of the projected circle and / or dot onto the patient's eye. As shown, the biometric device 214 may include depth sensors 264A-C. The depth sensor 264 may include the light projector 262. The depth sensor 264 may include an optical sensor. As shown, the biometric device 214 may include an optical low coherence reflectometer (OLCR) device 266. As shown, the biometric device 214 may include a wavefront device 268.

[0042] The wavefront device 268 may include one or more of a light source, a wavefront sensor, and the like. The light source may provide a first light wave to the eye 222. The wavefront sensor may receive a first disturbing light wave based on at least the first light wave from the eye 222. In one example, the wavefront device 268 may determine a first optical correction based on at least the first disturbing light. In another example, a computer system may determine a first optical correction based on at least the first disturbing light. The wavefront device 268 may provide data to the computer system based on at least the first disturbing light wave. For example, the computer system may determine a first optical correction based on at least the data from the wavefront device 268.

[0043] Any two or more of the image sensor 260, light projector 262, depth sensor 264, OLCR device 266, and wavefront device 268 may be combined. One or more of the image sensors 260A-C, one or more of the light projectors 262A-C, one or more of the depth sensors 264A-C, the OLCR device 266, and / or the wavefront device 268, etc. may generate data that can be used by a computer system. As shown, the biometric device 214 may include an optical system 110.

[0044] 3A, a second example of a medical system is shown. As shown, a surgeon 310 may use a surgical tool facility 320. In one example, the surgeon 310 may use the surgical tool facility 320 during a procedure involving an eye 222 of a patient 220. The medical system 300A may include an ophthalmic surgical tool tracking system. As shown, the medical system 300A may include a computer system 330, a display 340, and a microscope integrated display (MID) 350.

[0045] The computer system 330 can receive image frames captured by one or more image sensors. For example, the computer system 330 can perform various image processing on the one or more image frames. The computer system 330 can perform image analysis on the one or more image frames to identify and / or extract one or more images of the surgical tool system 320 from the one or more image frames. The computer system 330 can generate a graphical user interface (GUI) on which one or more image frames can be overlaid. For example, the GUI can include one or more indicators and / or one or more icons, etc. The one or more indicators can include surgical data, such as one or more positions and / or one or more orientations. The one or more indicators can include one or more warnings. The GUI can be displayed to the surgeon 310 and / or other medical personnel via the display 340 and / or the MID 350.

[0046] The computer system 330, the display 340, and the MID 350 may be implemented in separate housings communicatively coupled to each other or in a common console or housing. A user interface may be associated with one or more of the computer system 330, the display 340, and the MID 350. For example, the user interface may include one or more of a keyboard, a mouse, a joystick, a touch screen, an eye tracking device, a voice recognition device, a gesture control module, a dial, and / or a button, among other input devices. A user (e.g., the surgeon 310 and / or other medical personnel) may input desired commands and / or parameters via the user interface. For example, the user interface may be used to control one or more of the computer system 330, the display 340, and the MID 350. As shown, the MID 350 may include the optical system 110.

[0047] 3B, a third example of a medical system is shown. As shown, a surgeon 310 may use system 300B. For example, surgeon 310 may use system 300B during surgery involving eye 222 of patient 220. System 300B may include multiple systems. As shown, system 300B may include cutting system 315A. For example, surgeon 310 may use system 315A during cutting of eye 222. Eye 222 may include a flap in the cornea of ​​the eye of patient 220. As shown, system 300B may include shaping system 315B. For example, surgeon 310 may use shaping system 315B during resection of the interior of the cornea of ​​eye 222.

[0048] As shown, system 315A may include display 340A. As shown, system 315A may include MID 350A. As shown, MID 350A may include eyepieces 352AA, 352AB. Eyepiece 352A may refer to eyepiece 352AA or eyepiece 352BA. Eyepiece 352B may refer to eyepiece 352AB or eyepiece 352BB. System 315A may include one or more of image sensors 260A-260C, one or more of light projectors 262A-262C, one or more of depth sensors 264A-264C, OLCR device 266, wavefront device 268, and / or optical system 110A, etc. As shown, system 315B may include display 340B. As shown, system 315B may include MID 350B. As shown, MID 350B may include eyepieces 352BA, 352BB. System 315B may include one or more of image sensors 260A-C, one or more of light projectors 262A-C, one or more of depth sensors 264A-C, OLCR device 266, and / or wavefront device 268, etc. As shown, system 315B may include optical system 110B.

[0049] System 315A may include a laser, such as a femtosecond laser, that uses short laser pulses to ablate a series of small portions of corneal tissue to form a flap that is lifted to expose the interior of the cornea. The ablation of the flap may be planned and performed using one or both of cutting device displays 340A, 350A in conjunction with a controller and computer system 330A. As shown, system 315A may include computer system 330A. For example, computer system 330A may be communicatively coupled to one or more of image sensors 260A-C, one or more of light projectors 262A-C, one or more of depth sensors 264A-C, OLCR device 266, wavefront device 268, and / or optical system 110A of system 315A. As shown, system 315B may include computer system 330B. For example, computer system 330B may be communicatively coupled to one or more of image sensors 260A-260C, one or more of light projectors 262A-262C, one or more of depth sensors 264A-264C, OLCR device 266, wavefront device 268, and / or optical system 110B of system 315B.

[0050] The systems 315A, 315B may be physically separate as shown in FIG. 3B. The patient 220 may be moved between the systems 315A, 315B. Alternatively, the patient 220 may remain stationary and the systems 315A, 315B may be moved towards the patient 220. The systems 315A, 315B may be physically combined into a single integrated device such that neither the device nor the patient 220 need to be moved when switching between systems 315A and 315B.

[0051] The system 300B may include one or more controllers in a control system 315A, 315B. For example, the one or more controllers may include one or more of an interactive display, a touch screen display, a keyboard, a mouse, a touch pad, buttons, a joystick, foot pedals, a heads up display, and virtual reality glasses, or other devices capable of interacting with a user, such as a medical professional.

[0052] System 300B may include at least one computer system configured to generate images displayed on at least one of displays 340A, 350A, 340B, 350B, etc. For example, the at least one computer system may include one or more of computer systems 330A, 330B. One or more of computer systems 330A, 330B may be communicatively coupled to a viewing device, such as a microscope, a camera, an optical coherence tomography (OCT) device, or a display, or another device capable of measuring the position of the eye during surgery. One or more of computer systems 330A, 330B may be communicatively coupled to one or more of these controls.

[0053] In one example, the cutting device computer system 330A may i) be communicatively coupled to a viewing device for viewing the eye as the patient 220 is aligned with the system 315A, ii) be capable of providing graphical information regarding the planned flap location and the planned resection area to one or more of the displays 340A, 350A, and iii) be communicatively coupled to one or more controllers of the system 315A. In a second example, the shaping device computer 330B may i) be communicatively coupled to a viewing device for viewing the eye as the patient 220 is aligned with the shaping device, ii) be capable of providing graphical information regarding the planned flap location and the planned resection area to one or more of the displays 340B and 350B, and iii) be communicatively coupled to one or more controllers of the system 315B. In another example, the computer system may include the characteristics and / or attributes, etc., described above with respect to one or more of the computer systems 330A, 330B.

[0054] A computer system of system 300 may be communicatively coupled to another portion of system 300 by wire or wirelessly. One or more computer systems of system 300 may be communicatively coupled to remote computer systems and / or remote data centers that store patient data, treatment plans, and / or other information associated with a medical procedure and / or to databases stored locally on system 300. In one example, the database may include a relational database. In a second example, the database may include a graph database. In another example, the database may include a "not just SQL" (NoSQL) database.

[0055] The system 300 allows for input of information regarding the patient 220 and treatments to be administered to or that have actually been administered to the patient 220. The system 300 allows a user to enter and view information regarding the patient 220 and treatments to be administered to the patient 220. Such data may include information regarding the patient 220, such as identification information, the medical history of the patient 220, and / or information regarding the eye 222 being treated. Such data may include information regarding the treatment plan, such as the shape and location of the corneal incision and / or the shape and location of the ablation.

[0056] 3C, an example of an integrated microscope display and multiple example surgical tool sets are shown. As shown, surgical tool set 320A may be or include a scalpel. As shown, surgical tool set 320B may be or include a Q-tip. As shown, surgical tool set 320C may be or include tweezers. Other surgical tool sets not specifically shown may be used with one or more of the systems, one or more of the processes, and / or one or more of the methods described herein.

[0057] As an example, the surgical tool facility 320 may be marked with one or more patterns. The one or more patterns may be used in identifying the surgical tool facility 320. The one or more patterns may include one or more of a hash pattern, a stripe pattern, a fractal pattern, and the like. As another example, the surgical tool facility 320 may be marked with a dye and / or paint. The dye and / or paint may reflect one or more of visible light, infrared light, ultraviolet light, and the like. In one example, the illuminator 378 may provide ultraviolet light and the image sensor 372 may receive the ultraviolet light reflected from the surgical tool facility 320. The computer system 330 may receive image data from the image sensor 372 based at least on the ultraviolet light reflected from the surgical tool facility 320 and may use the image data to identify the surgical tool facility 320 from other image data provided by the image sensor 372 based at least on the ultraviolet light reflected from the surgical tool facility 320. In another example, the illuminator 378 can provide infrared light and the image sensor 372 can receive infrared light reflected from the surgical tool system 320. The computer system 330 can receive image data from the image sensor 372 based at least on the infrared light reflected from the surgical tool system 320 and can use the image data to identify the surgical tool system 320 from other image data provided by the image sensor 372 based at least on the infrared light reflected from the surgical tool system 320.

[0058] As shown, the MID 350 may include eyepieces 352A, 352B. As shown, the MID 350 may include displays 362A, 362B. The surgeon 310 may look through the eyepieces 352A, 352B. In one example, the display 362A may display one or more images through the eyepiece 352A. The left eye of the surgeon 310 may use the eyepiece 352A. In another example, the display 362B may display one or more images through the eyepiece 352B. The right eye of the surgeon 310 may use the eyepiece 352B. Although the MID 350 is shown as having multiple displays, the MID 350 may include a single display 362. For example, the single display 362 may display one or more images through one or more eyepieces 352A, 352B. The MID 350 may be implemented with one or more displays 362.

[0059] As shown, the MID 350 may include image sensors 372A, 372B. In one example, the image sensors 372A, 372B may capture images. In a second example, the image sensors 372A, 372B may include cameras. In another example, the image sensor 372 may capture images via one or more of visible light, infrared light, ultraviolet light, and the like. One or more of the image sensors 372A, 372B may provide image data to the computer system 330. Although the MID 350 is shown as having multiple image sensors, the MID 350 may include a single image sensor 372. The MID 350 may be implemented with one or more image sensors 372.

[0060] As shown, the MID 350 can include distance sensors 374A, 374. For example, the distance sensor 374 can determine a distance to the surgical tool fixture 320. The distance sensor 374 can determine a distance associated with the Z axis. Although the MID 350 is shown with multiple image sensors, the MID 350 can include a single distance sensor 374. In one example, the MID 350 can be implemented with one or more distance sensors 374. In another example, the MID 350 can be implemented without a distance sensor.

[0061] As shown, the MID 350 may include lenses 376A, 376B. Although the MID 350 is shown with multiple lenses 376A, 376B, the MID 350 may include a single lens 376. The MID 350 may be implemented with one or more lenses 376. As shown, the MID 350 may include illuminators 378A, 378B. For example, the illuminator 378 may provide and / or generate one or more of visible light, infrared light, and ultraviolet light. Although the MID 350 is shown with multiple illuminators, the MID 350 may include a single illuminator 378. The MID 350 may be implemented with one or more illuminators 378. The MID 350 may include one or more structures and / or one or more functions similar to those described with reference to the biometric device 214. In one example, the MID 350 may include an OLCR device 266. In another example, the MID 350 may include a wavefront device 268. The MID 350 may include a biometric device 214. The MID 350 may include an optical system 110.

[0062] 3D, another example of a medical system is shown. As shown, the medical system 300C may include an inhalation cone 380. For example, the inhalation cone 380 may be or include an applanation cone. As shown, the inhalation cone 380 may include the optical system 110. As shown, the computer system 330 may be coupled to a controller 382 of the inhalation cone 380. For example, the computer system 330 may control the inhalation cone 380 via the controller 382. The inhalation cone 380 may be docked with the inhalation ring 384 after the inhalation ring 384 is docked with the eye 222. As shown, the inhalation cone 380 may include a lens 386. Although the lens 386 is shown as being flat or planar, the lens 386 may include a concave shape and / or a convex shape. If the lens 386 is flat, the lens 386 may be referred to as an applanation planar.

[0063] As shown, the medical system 300C can include a vacuum system 390. As shown, the vacuum system 390 can be communicatively coupled to a computer system 330. For example, the computer system 330 can control the vacuum system 390. The vacuum system 390 can generate one or more low pressures via one or more lines 392, 394. For example, the vacuum system 390 can generate one or more low pressures via line 394 to adhere and / or seal the suction ring 384 to the patient's eye 222. As shown, the medical system 300C can include lines 392, 394 and the suction ring 384.

[0064] 4, an example of a computer system is shown. As shown, computer system 400 may include a processor 410, a volatile memory medium 420, a non-volatile memory medium 430, and an input / output (I / O) device 440. As shown, volatile memory medium 420, non-volatile memory medium 430, and I / O device 440 may be communicatively coupled to processor 410.

[0065] The term "memory medium" may refer to "memory," "storage device," "memory device," "computer-readable medium," and / or "tangible computer-readable storage medium." For example, memory medium may include, but is not limited to, storage media such as direct access storage devices including hard disk drives, sequential access storage devices such as tape disk drives, compact disks (CDs), random access memory (RAM), read-only memory (ROM), CD-ROMs, digital versatile disks (DVDs), electrically erasable programmable read-only memory (EEPROM), flash memory, non-transitory media, and / or combinations of one or more of the above. As shown, non-volatile memory medium 430 may include processor instructions 432. Processor instructions 432 may be executed by processor 410. In one example, one or more portions of processor instructions 432 may be executed via non-volatile memory medium 430. In another example, one or more portions of processor instructions 432 may be executed via volatile memory medium 420. One or more portions of the processor instructions 432 may be transferred to the volatile memory medium 420 .

[0066] The processor 410 may execute the processor instructions 432 in performing at least a portion of one or more systems, one or more flow diagrams, one or more processes, and / or one or more methods described herein. For example, the processor instructions 432 may comprise, code, and / or encode instructions executable by a processor in accordance with at least a portion of one or more systems, one or more flow diagrams, one or more methods, and / or one or more processes described herein. Although the processor 410 is shown as a single processor, the processor 410 may be or include multiple processors. One or more of the storage medium and memory medium may be a software product, a program product, and / or an article of manufacture. For example, the software product, the program product, and / or an article of manufacture may be comprised, code, and / or encode instructions executable by a processor in accordance with at least a portion of one or more systems, one or more flow diagrams, one or more methods, and / or one or more processes described herein.

[0067] The processor 410 may include any suitable system, apparatus, or device operable to interpret and execute program instructions, process data, or both stored in a memory medium and / or received over a network. The processor 410 may further include one or more microprocessors, microcontrollers, digital signal processors (DSPs), application specific integrated circuits (ASICs), or other circuitry configured to interpret and execute program instructions, process data, or both.

[0068] I / O devices 440 may include any device or devices that permit, authorize, and / or enable a user to interact with computer system 400 and associated elements by enabling input from and output to a user. Enabling input from a user allows the user to operate and / or control computer system 400, and enabling output to a user allows computer system 400 to display the effects of the user's operations and / or controls. For example, I / O devices 440 may enable a user to input data, instructions, or both into computer system 400 and otherwise operate and / or control computer system 400 and associated elements. I / O devices may include user interface devices such as a keyboard, mouse, touch screen, joystick, handheld lens, tool tracker, coordinate input device, or any other I / O suitable for use with the system.

[0069] The I / O device 440 may include one or more buses, one or more serial devices, and / or one or more network interfaces, etc., that enable and / or permit the processor 410 to execute at least a portion of one or more of the systems, processes, and / or methods, etc., described herein. In one example, the I / O device 440 may include a storage interface that enables and / or permits the processor 410 to communicate with external storage. The storage interface may include a Universal Serial Bus (USB) interface, a SATA (Serial ATA) interface, a PATA (Parallel ATA) interface, a Small Computer System Interface (SCSI), etc. In a second example, the I / O device 440 may include a network interface that enables and / or permits the processor 410 to communicate with a network. The I / O device 440 may include one or more of a wireless network interface and a wired network interface. In a third example, the I / O device 440 may include a peripheral component interconnect (PCI) interface, a PCI Express (PCIe) interface, a serial peripheral component interconnect (SPI) interface, and an inter-integrated circuit (IIC). 2 In a fourth example, the I / O device 440 may include circuitry that allows the processor 410 to communicate data with one or more sensors. In a fifth example, the I / O device 440 may enable and / or allow the processor 410 to communicate data with one or more of the display 450, the MID 460, etc. In another example, the I / O device 440 may enable and / or allow the processor 410 to communicate data with the imager 470. As shown, the I / O device 440 may be coupled to a network 480. For example, the I / O device 440 may include a network interface.

[0070] Network 480 may include a wired network, a wireless network, an optical network, or a combination of the above, etc. Network 480 may include and / or be coupled to various types of communication networks. For example, network 480 may include and / or be coupled to a local area network (LAN), a wide area network (WAN), the Internet, a public switched telephone network (PSTN), a cellular telephone network, a satellite telephone network, or a combination of the above, etc. WAN may include a private WAN, a corporate WAN, a public WAN, or a combination of the above, etc.

[0071] The computer systems described herein may include one or more of the structures and / or one or more of the functions described with respect to computer system 400. In one example, computer system 152 may include one or more of the structures and / or one or more of the functions described with respect to computer system 400. In a second example, computer system 212 may include one or more of the structures and / or one or more of the functions described with respect to computer system 400. In a third example, computer system 330 may include one or more of the structures and / or one or more of the functions described with respect to computer system 400. In another example, the computer system of MID 350 may include one or more of the structures and / or one or more of the functions described with respect to computer system 400.

[0072] 5, an example of a method of operating an optical system is shown. At 510, a laser beam may be generated. For example, laser 120 may generate the laser beam. Computer system 152 may provide control information to laser 120 indicating to generate the laser beam. For example, laser 120 may receive the control information from computer system 152 and generate the laser beam according to the control information.

[0073] At 515, the laser beam can be directed to the test surface. For example, collection optics 140 can direct the laser beam to surface 112. Collection optics 140 can reflect a portion of the laser beam. The remaining laser beam can continue to surface 112. At 520, the reflected portion of the laser beam can be directed to TPA detector 130. For example, detection optics 122 can direct the reflected portion of the laser beam to TPA detector 130. The reflected portion of the laser beam can be reflected from surface 112.

[0074] At 525, an intensity of the reflected portion of the laser beam may be determined. For example, TPA detector 130 may determine the intensity of the reflected portion of the laser beam. TPA detector 130 may convert the intensity of the reflected portion of the laser beam into digital data indicative of the intensity of the reflected portion of the laser beam. TPA detector 130 may provide the digital data indicative of the intensity of the reflected portion of the laser beam to computer system 152. Computer system 152 may receive the digital data indicative of the intensity of the reflected portion of the laser beam.

[0075] At 530, it may be determined whether the intensity of the reflected portion of the laser beam is a maximum intensity. The intensity of the reflected portion of the laser beam may be a peak intensity because photons in the reflected portion of the laser beam may behave as a wave. The computer system 152 may determine whether the intensity of the reflected portion of the laser beam is a maximum intensity from the digital data indicative of the intensity of the reflected portion of the laser beam. Determining whether the intensity of the reflected portion of the laser beam is a maximum intensity may include comparing the intensity of the reflected portion of the laser beam to one or more other intensities of repetitive other reflected portions of the laser beam. For example, the computer system 152 may store and / or access the one or more other intensities via a memory medium.

[0076] If the signal is not at maximum strength, then at 535, the collection optics 140 may be adjusted. For example, the computer system 152 may adjust the collection optics 140. The computer system 152 may provide control information to the collection optics 140 indicating at least one adjustment of the collection optics 140. For example, the computer system 152 may provide control information to the beam expander 141 indicating at least one adjustment to one or more of the lenses 142A, 142B. Adjusting the collection optics 140 may direct the focal point of the laser beam to a different location with respect to the Z axis. For example, adjusting the collection optics 140 may direct the focal point of the laser beam toward or away from the surface 112. The method may proceed to 510.

[0077] If the signal is maximum, then at 540 it may be determined that the focal point is at surface 112. For example, computer system 152 may determine that the focal point is at surface 112. Interpolation may be used to refine the location of surface 112. At 545, results may be provided. For example, computer system 152 may provide the results. Providing the results may include one or more of displaying the results on a display, printing the results on a printer, storing the results on a memory medium, transmitting the results to a communications network, etc.

[0078] 6, an example of a method for determining whether an objective lens is problematic is shown. At 610, a plurality of first portions of a laser beam can be provided to an objective lens of an optical system. Providing the plurality of first portions of the laser beam to the objective lens may include directing the plurality of first portions of the laser beam to the objective lens. For example, one or more of the polarizer 124, the wave plate 134, the beam expander 141, and the scanner 144 can direct the plurality of first portions of the laser beam to the objective lens 148.

[0079] At 615, a plurality of first portions of the laser beam can be provided to each of a plurality of locations on the test surface. In one example, as shown in FIG. 7A, the objective lens 148 can provide a plurality of first portions of the laser beam to each of a plurality of locations 710A-710M on the surface 112. In a second example, as shown in FIG. 7B, the objective lens 148 can provide a plurality of first portions 720A-720C of the laser beam to each of a plurality of locations on the surface 112. In a third example, as shown in FIG. 7D, the objective lens 148 can provide a plurality of first portions 720A, 720B of the laser beam to each of a plurality of locations on the surface 112. In a fourth example, as shown in FIG. 7F, the objective lens 148 can provide a plurality of first portions 720A, 720B of the laser beam to each of a plurality of locations on the surface 112. In another example, as shown in FIG. 7H, objective lens 148 can provide a plurality of first portions 720A, 720B of a laser beam to each of a plurality of locations on surface 112. First portions 720 of the laser beam can include a plurality of photons. Although surface 112 is shown in FIGS. 7A-7M as being circular, surface 112 can be any shape. For example, surface 112 can be rectangular, polygonal, etc. Providing a plurality of first portions of the laser beam to each of a plurality of locations on the test surface can include use of a scanner 144. For example, a plurality of first portions of the laser beam can be controlled via scanner 144 to be sequentially provided to each of a plurality of locations on the test surface.

[0080] At 620, a plurality of second portions of the laser beam may be received from the test surface. For example, the objective lens 148 may receive a plurality of second portions of the laser beam from the surface 112. The second portions of the laser beam may be reflected by the test surface. In one example, the second portions 730A-730C of the laser beam may be reflected by the surface 112 as shown in FIG. 7C. In a second example, the second portions 730A, 730B of the laser beam may be reflected by the surface 112 as shown in FIG. 7E. In a third example, the second portions 730A, 730B of the laser beam may be reflected by the surface 112 as shown in FIG. 7G. In another example, the second portions 730A, 730B of the laser beam may be reflected by the surface 112 as shown in FIG. 7I. The second portions 730 of the laser beam may include a plurality of photons. For example, the second portions 730 of the laser beam may include a plurality of photons of the plurality of photons associated with the first portions 720 of the laser beam. As shown in FIGURE 7E, the objective lens 148 may not receive the second portion 730B of the laser beam. For example, as shown in FIGURE 7E, the second portion 730B may not be reflected to the objective lens 148. As shown in FIGURE 7I, the aperture 160 may block or block the second portion 730B. For example, the aperture 160 may block or block the second portion 730B from reaching the TPA detector 130. Each of the second portions of the laser beam may be associated with a plurality of first portions of the laser beam that are reflected from the test surface.

[0081] At 625, the plurality of second portions of the laser beam can be provided to the TPA detector. For example, the plurality of second portions of the laser beam can be provided to the TPA detector 130. One or more of the plurality of second portions 730A-730C can be provided to the TPA detector 130. Providing the plurality of second portions of the laser beam to the TPA detector can include directing the plurality of second portions of the laser beam to the TPA detector. For example, one or more of the scanner 144, the beam expander 141, the wave plate 134, the polarizer 124, and the lens 128 can direct one or more of the plurality of second portions of the laser beam 730A-730C to the TPA detector 130.

[0082] At 630, a plurality of intensities each associated with a plurality of second portions of the laser beam can be determined. For example, the TPA detector 130 can determine a plurality of intensities each associated with a plurality of second portions of the laser beam. The second portions 730A-730C can be associated with each of a plurality of intensities. The second portions 730A-730C can be associated with each of the same or similar intensities. In one example, the TPA detector 130 can determine a first intensity associated with the plurality of second portions 730A of the laser beam. In a second example, the TPA detector 130 can determine a second intensity associated with the plurality of second portions 730A, 730B of the laser beam. The second intensity can be greater than the first intensity. In another example, the TPA detector 130 can determine a third intensity associated with the plurality of second portions 730A-730C of the laser beam. The third intensity can be greater than the second intensity. Although three plurality of second portions 730A-730C are illustrated as an example, other plurality of second portions 730 may be present and / or used.

[0083] At 635, the plurality of intensities can be converted to data representative of a plurality of measurements of the plurality of intensities. In one example, the TPA detector 130 can convert the plurality of intensities to data representative of a plurality of measurements of the plurality of intensities. The TPA detector 130 can provide the data representative of the plurality of measurements of the plurality of intensities to the computer system 152. The TPA detector 130 can convert a first intensity associated with the plurality of second portions of the laser beam 730A to first data representative of a measurement of the first intensity. The TPA detector 130 can convert a second intensity associated with the plurality of second portions of the laser beam 730A, 730B to second data representative of a measurement of the second intensity. The TPA detector 130 can convert a third intensity associated with the plurality of second portions of the laser beam 730A-730C to third data representative of a measurement of the third intensity.

[0084] In another example, an analog-to-digital converter (ADC) can convert signals from the TPA detector 130 associated with the multiple intensities into digital data representing multiple measurements of the multiple intensities. The ADC can convert an analog signal from the TPA detector 130 associated with a first intensity associated with the multiple second portions 730A of the laser beam into first data representing a measurement of the first intensity. The ADC can convert an analog signal from the TPA detector 130 associated with a second intensity associated with the multiple second portions 730A, 730B of the laser beam into second data representing a measurement of the second intensity. The ADC can convert an analog signal from the TPA detector 130 associated with a third intensity associated with the multiple second portions 730A-730C of the laser beam into third data representing a measurement of the third intensity.

[0085] The computer system 152 can receive data representing a plurality of measurements of a plurality of intensities. In one example, the computer system 152 can receive first data representing a measurement of a first intensity. In a second example, the computer system 152 can receive second data representing a measurement of a second intensity. In another example, the computer system 152 can receive third data representing a measurement of a third intensity.

[0086] At 640, it can be determined from the data whether an intensity value of the plurality of intensities is less than an intensity threshold. The intensity value of the plurality of intensities can be a peak intensity value since some photons of the laser beam can behave as waves. The threshold intensity value can be a minimum intensity value. If a portion of the laser beam is not received by the objective lens 148, the intensity value can be less than the intensity threshold. In one example, as shown in FIG. 7E, a portion 730B of the laser beam can be not received by the objective lens 148. In another example, as shown in FIG. 7I, an aperture 160 can block a portion 730B of the laser beam. Any of these examples can contribute to or cause the intensity value to be less than the intensity threshold. If a portion of the laser beam is not received by the objective lens 148, the portion of the laser beam may not be provided to the TPA detector 130.

[0087] One or more aberrations of the objective lens 148 may cause one or more errors in one or more focuses of the objective lens 148. In one example, one or more aberrations of the objective lens 148 may cause the objective lens 148 to focus behind the surface 112, as shown in FIG. 7K. As shown, the focal point 740A may be behind the surface 112. As shown in FIG. 7L, the second portions 730A, 730B may not return along the path associated with the first portions 720A, 720B. In another example, one or more aberrations of the objective lens 148 may cause the objective lens 148 to focus before the surface 112, as shown in FIG. 7M. As shown, the focal point 740B may be before the surface 112. As shown in FIG. 7N, the second portions 730A, 730B may not return along the path associated with the first portions 720A, 720B, respectively.

[0088] If the objective lens 148 does not focus the first portion 720 at the location 710 on the surface 112, the second portion 730 may not return along the path associated with the first portion 720. For example, the objective lens 148 may cause the focus 740 of the first portion 720 to not be at the surface 120, as shown in FIGS. 7J and 7L. If the second portion 730 does not return along the path associated with the first portion 720, the intensity of one or more of the second portions of the laser beam may be attenuated. In one example, the second portion 730 may not return along the path associated with the first portion 720, as shown in FIGS. 7K and 7M. In another example, the objective lens 148 not focusing the first portion 720 on the surface 112, as shown in FIGS. 7D and 7H, respectively, may result in the second portion 730 being as shown in FIGS. 7E and 7I.

[0089] If the intensity values ​​of the plurality of intensities are less than the intensity threshold value, information indicative of a problem with the objective lens may be provided at 645. Providing the information indicative of a problem with the objective lens may include one or more of displaying the information indicative of a problem with the objective lens on a display, storing the information indicative of a problem with the objective lens on a memory medium, transmitting the information indicative of a problem with the objective lens on a network, etc. If the information indicates that the objective lens has a problem, the objective lens may be repaired or replaced.

[0090] If the intensity values ​​of the plurality of intensities are not less than the intensity threshold value, information indicating that there is no problem with the objective lens can be provided at 650. Providing the information indicating that there is no problem with the objective lens can include one or more of displaying the information indicating that there is no problem with the objective lens on a display, storing the information indicating that there is no problem with the objective lens in a memory medium, transmitting the information indicating that there is no problem with the objective lens to a network, etc.

[0091] One or more methods and / or processing elements, and / or one or more portions of methods and / or processor elements may be performed in various orders, repeated, or omitted. Further, additional, complementary, and / or overlapping methods and / or processing elements may be implemented, instantiated, and / or performed, as desired. Further, one or more system elements may be omitted and / or additional system elements may be added, as desired.

[0092] The memory medium may be and / or include an article of manufacture. For example, the article of manufacture may include and / or be a software product and / or a program product. The memory medium may be coded and / or encoded with processor-executable instructions according to one or more of the flow diagrams, systems, methods, and / or processes described herein to produce the article of manufacture.

[0093] The subject matter disclosed above should be considered as illustrative and not limiting, and the appended claims are intended to cover all such modifications, extensions, and other implementations that fall within the true spirit and scope of the present disclosure. Accordingly, the scope of the present disclosure shall be determined by the broadest permissible interpretation of the following claims and equivalents to the maximum extent permitted by law, and shall not be constrained or limited by the above detailed description.

Claims

1. 1. A health care system comprising: At least one processor; a two-photon absorption (TPA) detector coupled to the at least one processor; a memory medium coupled to the at least one processor, the memory medium including instructions executable by the at least one processor; The instructions, when executed by the at least one processor, provide the medical system with: directing a plurality of first portions of the laser beam to an objective lens of an optical system; directing the plurality of first portions of the laser beam through the objective lens to each of a plurality of locations on a test surface; receiving, through the objective lens, a plurality of second portions of the laser beam reflected by the test surface; directing a plurality of second portions of the laser beam to a TPA detector; The TPA detector comprises: determining a plurality of intensities each associated with a plurality of second portions of the laser beam; configured to convert the plurality of intensities into data representative of a plurality of intensity values ​​of the plurality of intensities; The instructions further include: determining from the data whether each intensity value of the plurality of intensities is less than an intensity threshold; determining that, if the intensity value of the plurality of intensities is less than the intensity threshold, a second path of the second portion associated with the intensity value differs from a first path of an associated first portion in that the second path bypasses the objective lens; determining that a problem associated with the objective lens is that the second path bypasses the objective lens; providing information indicating that the second path bypasses the objective lens; A medical system that, if the intensity value of the plurality of intensities is not less than the intensity threshold, provides information indicating that there is no problem with the objective lens.

2. The medical system of claim 1 , further comprising a laser configured to generate the laser beam.

3. The medical system of claim 1 further comprising a biometric device including the optical system.

4. The medical system of claim 1 , wherein the objective lens comprises an F-theta lens.

5. the optical system includes at least one mirror; The instructions further include: The medical system of claim 1 , wherein the at least one mirror is adjusted to provide the first portions of the laser beam to each of the locations on the test surface.

6. Further comprising a plurality of lenses different from the objective lens; The medical system of claim 1 , wherein the instructions further cause the medical system to adjust the plurality of lenses to expand a diameter of each of the plurality of first portions of the laser beam.

7. The optical system according to claim 1, The instructions further cause the medical system to adjust a diameter of the aperture of the iris; 10. The medical system of claim 1, wherein the aperture allows light reflected from the test surface to pass through the opening and blocks light reflected from the test surface outside the opening.

8. The medical system of claim 1 , wherein a problem with the objective lens is optical aberrations.

9. The medical system of claim 1 , wherein the test surface is partially reflective.

10. 1. A method for testing an objective lens of an optical system, comprising: directing a plurality of first portions of a laser beam to the objective lens of the optical system; the objective lens directing the first portions of the laser beam to each of a plurality of locations on a test surface; the objective lens receiving a plurality of second portions of the laser beam reflected by the test surface; directing a plurality of second portions of the laser beam to a two-photon absorption (TPA) detector; the TPA detector determining a plurality of intensities each associated with the plurality of second portions of the laser beam; converting the plurality of intensities into data representative of a plurality of intensity values ​​of the plurality of intensities; determining from the data whether each intensity value of the plurality of intensities is less than an intensity threshold; determining, if the intensity value of the plurality of intensities is less than the intensity threshold, that a second path of the second portion associated with the intensity value differs from a first path of an associated first portion in that the second path bypasses the objective lens; determining that a problem associated with the objective lens is such that the second path bypasses the objective lens; providing information indicating that the second path bypasses the objective lens; providing information indicating there is no problem with the objective lens if the intensity value of the plurality of intensities is not less than the intensity threshold value.

11. The method of claim 10 , wherein a medical system includes the optical system.

12. The method of claim 11 , wherein the medical system includes a biometric device that includes the optical system.

13. The method of claim 10 , wherein the objective lens comprises an F-theta lens.

14. the optical system includes at least one mirror; The method further comprises:

11. The method of claim 10, further comprising adjusting the at least one mirror to direct the first portions of the laser beam to each of the locations on the test surface.

15. the optical system includes a plurality of lenses different from the objective lens; The method further comprises: The method of claim 10 comprising adjusting the plurality of lenses to expand a diameter of each of a plurality of first portions of the laser beam.

16. The optical system according to claim 1, further comprising adjusting a diameter of an opening of the aperture. The method of claim 10 , wherein the aperture allows light reflected from the test surface to pass through the opening and blocks light reflected from the test surface outside the opening.

17. The method of claim 10 , wherein a problem with the objective lens is optical aberrations.

18. The method of claim 10 , wherein the test surface is partially reflective.

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