# US 10,500,010 B2 · Multispectral light source > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 10,500,010 B2 - Document ID: US10500010B2 - Status: Granted - Kind: B2 - Application number: 15/159,723 - Filed: 2016-05-19 - Published: 2016-11-24 - Granted: 2019-12-10 - Earliest claimed: 2015-05-19 - Assignees: Invuity, Inc. - Applicants: Invuity, Inc. - Inventors: Alex Vayser; Gaston Tudury; John Black - Web page: https://patentgrep.com/patent/US10500010B2 ## CPC - A61B 90/30: Devices for illuminating a surgical field, the devices having an interrelation with other surgical devices or with a surgical procedure - G02B 7/006: {Filter holders} - G02B 27/48: Laser speckle optics - A61B 2090/309: {using white LEDs} - G02B 26/008: {in the form of devices for effecting sequential colour changes, e.g. colour wheels} - A61B: DIAGNOSIS; SURGERY; IDENTIFICATION (usefulness limited to only animals A61D) - G02B: OPTICAL ELEMENTS, SYSTEMS OR APPARATUS ## Abstract Medical illumination systems and devices for illuminating a target surgical area with a pre-selected type of multispectral light to aid tissue differentiation as viewed by the human eye, especially in open-surgery settings, and methods for practicing the same. A light source may have multiple settings selectable to provide various types of multispectral light configured to reduce reflection from corresponding tissue types relative to full-spectrum light. A pre-selected type of multispectral light may be configured to reduce reflection from blood. An illumination system or device can have one more illumination elements, including combinations of LEDs, lasers, and filtered broadband light sources. The multispectral light may be or comprise one or more of a continuous or pulsed wave. ## Claims ### Claim 1 A surgical illumination device for illuminating a target surgical area to aid tissue differentiation, said surgical illumination device comprising: at least one illumination source configured to generate light; a plurality of optical filters, wherein each optical filter is configured to substantially remove a pre-selected spectral band from the light when the light passes through the optical filter; and a plurality of turrets coupled to the plurality of optical filters, wherein each turret is rotatable, about an axis parallel to a transmission path of the light, among a plurality of positions, wherein the plurality of positions of the plurality of turrets define a plurality of spectral configuration settings, wherein each spectral configuration setting corresponds to a respective subset of the plurality of optical filters being aligned with the transmission path of the light such that the light passes through the respective subset of the plurality of optical filters and is transformed into a respective type of filtered multispectral light, wherein, for at least one of the plurality of spectral configuration settings, the respective subset of the plurality of optical filters causes the filtered multispectral light to comprise substantially no visible light emission beyond 650 nm, wherein the plurality of turrets comprises: a first turret rotatable, about the axis parallel to the transmission path of the light, among a plurality of first positions; and a second turret rotatable, about an axis parallel to the transmission path of the light, among a plurality of second positions wherein the plurality of optical filters comprises a plurality of first optical filters and a plurality of second optical filters, wherein the plurality of first optical filters are coupled to the first turret with each first optical filter at a respective location around the axis, wherein the plurality of second optical filters are coupled to the second turret with each second optical filter at a respective location around the axis, and wherein each subset of the plurality of optical filters comprises one of the plurality of first optical filters and one of the plurality of second optical filters. ### Claim 2 (depends on 1) The surgical illumination device of claim 1, wherein the at least one illumination source comprises two or more distinct illumination elements. ### Claim 3 (depends on 1) The surgical illumination device of claim 1, wherein the at least one illumination source comprises two discrete color light-emitting diodes (LEDs). ### Claim 4 (depends on 1) The surgical illumination device of claim 1, wherein, for at least one of the plurality of spectral configuration settings, the respective subset of the plurality of optical filters causes the filtered multispectral light to have a pre-selected type of light consisting of two or three spectral bands. ### Claim 5 (depends on 4) The surgical illumination device of claim 4, wherein the two or three spectral bands each have a peak intensity wavelength, and wherein a separation between peak intensity wavelengths of adjacent spectral bands of the two or three spectral bands is at least 50 nm. ### Claim 6 (depends on 1) The surgical illumination device of claim 1, wherein, for at least one of the plurality of spectral configuration settings, the respective subset of the plurality of optical filters causes the filtered multispectral light to have a pre-selected type of light having a central spectral band that is centered at no more than 625 nm. ### Claim 7 (depends on 1) The surgical illumination device of claim 1, wherein, for at least one of the plurality of spectral configuration settings, the respective subset of the plurality of optical filters causes the filtered multispectral light to have a pre-selected type of light comprising two adjacent spectral bands, and wherein a light intensity in a valley region between the two adjacent spectral bands is less than 50% of a light intensity of both of the two adjacent spectral bands. ### Claim 8 (depends on 1) The surgical illumination device of claim 1, wherein, for at least one of the plurality of spectral configuration settings, the respective subset of the plurality of optical filters causes the filtered multispectral light to have a pre-selected type of light that is white light with a color temperature above 5000K. ### Claim 9 (depends on 1) The surgical illumination device of claim 1, wherein, for at least one of the plurality of spectral configuration settings, the respective subset of the plurality of optical filters causes the filtered multispectral light to have a pre-selected type of light having a spectral band centered at between 590 nm to 610 nm. ### Claim 10 (depends on 1) The surgical illumination device of claim 1, wherein, for at least one of the plurality of spectral configuration settings, the respective subset of the plurality of optical filters causes the filtered multispectral light to have a pre-selected type of light having a spectral band centered between 490 nm and 510 nm. ### Claim 11 (depends on 1) The surgical illumination device of claim 1, wherein, for at least one of the plurality of spectral configuration settings, the respective subset of the plurality of optical filters causes the filtered multispectral light to have a pre-selected type of light having a spectral band centered between 530 nm and 550 nm. ### Claim 12 (depends on 1) The surgical illumination device of claim 1, wherein, for at least one of the plurality of spectral configuration settings, the respective subset of the plurality of optical filters causes the filtered multispectral light to have a pre-selected type of light having a first spectral band centered at 415 nm and a second spectral band centered at 540 nm. ### Claim 13 (depends on 1) The surgical illumination device of claim 1, wherein, for at least one of the plurality of spectral configuration settings, the respective subset of the plurality of optical filters causes the filtered multispectral light to have a pre-selected type of light having a spectral band centered at 415 nm. ### Claim 14 (depends on 1) The surgical illumination device of claim 1, wherein, for at least one of the plurality of spectral configuration settings, the respective subset of the plurality of optical filters causes the filtered multispectral light to have a pre-selected type of light comprising a first spectral band and a second spectral band, and wherein the first spectral band is centered at 625 nm, and the second spectral band is centered at 600 nm, and wherein power at the first spectral band is equal to or less than power at the second spectral band. ### Claim 15 (depends on 1) The surgical illumination device of claim 1, wherein, for at least one of the plurality of spectral configuration settings, the respective subset of the plurality of optical filters causes the filtered multispectral light to comprise substantially no light emission between 650 nm and 730 nm. ### Claim 16 (depends on 1) The surgical illumination device of claim 1, wherein, for at least one of the plurality of spectral configuration settings, the respective subset of the plurality of optical filters causes the filtered multispectral light to be configured to reduce reflection from blood relative to full-spectrum light. ### Claim 17 (depends on 1) The surgical illumination device of claim 1, wherein, for at least one of the plurality of spectral configuration settings, the respective subset of the plurality of optical filters causes the filtered multispectral light to be configured to aid tissue differentiation as viewed by a human eye in an open-surgery settings. ### Claim 18 (depends on 1) The surgical illumination device of claim 1, wherein, for at least one of the plurality of spectral configuration settings, the respective subset of the plurality of optical filters causes the filtered multispectral light to comprise a near-infrared spectral band for imaging by an image capture device. ### Claim 19 (depends on 18) The surgical illumination device of claim 18, further comprising the image capture device configured to detect near-infrared light. ### Claim 20 (depends on 18) The surgical illumination device of claim 18, wherein, for at least one of the plurality of spectral configuration settings, the respective subset of the plurality of optical filters causes the filtered multispectral light to have at least one visible spectral band of a continuous wave and at least one near-infrared spectral band of a pulsed wave. ### Claim 21 (depends on 1) The surgical illumination device of claim 1, wherein the at least one illumination source comprises at least one of a discrete color light-emitting diode (LED), a laser, or a filtered broadband light source. ### Claim 22 (depends on 1) The surgical illumination device of claim 1, wherein, for at least one of the plurality of spectral configuration settings, the respective subset of the plurality of optical filters causes the filtered multispectral light to comprise at least one spectral band that is a continuous wave. ### Claim 23 (depends on 1) The surgical illumination device of claim 1, wherein, for at least one of the plurality of spectral configuration settings, the respective subset of the plurality of optical filters causes the filtered multispectral light to comprise at least one spectral band that is a pulsed wave. ### Claim 24 (depends on 1) The surgical illumination device of claim 1, further comprising a despeckling element to reduce laser speckle. ### Claim 25 (depends on 1) The surgical illumination device of claim 1, further comprising a collimator configured to collimate the light between the illumination source and the plurality of optical filters. ### Claim 26 (depends on 25) The surgical illumination device of claim 25, further comprising an angle-tuned pre-filter between the collimator and the plurality of optical filters. ### Claim 27 A medical method for illuminating a target surgical area to aid tissue differentiation, said medical method comprising: providing a medical illumination device comprising: at least one illumination source configured to generate light, a plurality of optical filters, wherein each optical filter is configured to substantially remove a pre-selected spectral band from the light when the light passes through the optical filter, and a plurality of turrets coupled to the plurality of optical filters, wherein each turret is rotatable, about an axis parallel to a transmission path of the light, among a plurality of positions, wherein the plurality of positions of the plurality of turrets define a plurality of spectral configuration settings, wherein each spectral configuration setting corresponds to a respective subset of plurality of optical filters being aligned with the transmission path of the light such that the light passes through the respective subset of the plurality of optical filters and is transformed into a respective type of filtered multispectral light, wherein the plurality of turrets comprises: (i) a first turret rotatable, about the axis parallel to the transmission path of the light, among a plurality of first positions; and (ii) a second turret rotatable, about an axis parallel to the transmission path of the light, among a plurality of second positions wherein the plurality of optical filters comprises a plurality of first optical filters and a plurality of second optical filters, wherein the plurality of first optical filters are coupled to the first turret with each first optical filter at a respective location around the axis, wherein the plurality of second optical filters are coupled to the second turret with each second optical filter at a respective location around the axis, and wherein each subset of the plurality of optical filters comprises one of the plurality of first optical filters and one of the plurality of second optical filters; selecting a spectral configuration setting from among the plurality of spectral configuration settings, wherein selecting the spectral configuration setting comprises rotating the plurality of turrets about the axis to position the respective subset of the plurality of optical filters, which corresponds to the spectral configuration setting, in alignment with the transmission path of the light; and after selecting the spectral configuration setting, illuminating a target surgical area of a patient with the respective type of filtered multispectral light for the spectral configuration setting from the medical illumination device, wherein, for at least one of the plurality of spectral configuration settings, the respective subset of the plurality of optical filters causes the filtered multispectral light to comprise substantially no visible light emission beyond 650 nm. ### Claim 28 (depends on 27) The medical method of claim 27, wherein the respective type of filtered multispectral light for the spectral configuration setting comprises substantially no light emission between 650 nm and 730 nm. ### Claim 29 (depends on 27) The medical method of claim 27, wherein the respective type of filtered multispectral light for the spectral configuration setting is configured to reduce reflection from blood relative to full-spectrum light. ### Claim 30 (depends on 27) The medical method of claim 27, wherein the respective type of filtered multispectral light for the spectral configuration setting is configured to aid tissue differentiation as viewed by a human eye in an open-surgery setting. ### Claim 31 (depends on 27) The medical method of claim 27, wherein the respective type of filtered multispectral light for the spectral configuration setting comprises a near-infrared spectral band for imaging by an image capture device. ### Claim 32 (depends on 27) The medical method of claim 27, wherein the at least one illumination source of the medical illumination device comprises at least one a discrete color light-emitting diode (LED), a laser, or a filtered broadband light source. ### Claim 33 (depends on 27) The medical method of claim 27, wherein the respective type of filtered multispectral light for the spectral configuration setting comprises a pre-selected type of light comprising at least one spectral band that is a continuous wave. ### Claim 34 (depends on 27) The medical method of claim 27, wherein the respective type of filtered multispectral light for the spectral configuration setting comprises a pre-selected type of light comprising at least one spectral band that is a pulsed wave.