A gas detecting apparatus, comprising: an infrared detector configured to monitor a presence of one or more gases in a field-of-interest, FOI, wherein the IR detector generates IR light distribution information within the FOI to be analyzed to identify the presence of one or more gases for a gas leak detection; further comprising a visible light projector configured: (i) to project, onto objects in the FOI, a visible frame image that frames an outer edge of the FOI during the gas leak detection, and (ii) to project, onto objects in the FOI, a visible image based on analysis by a processor, said processor configured to analyze the IR light distribution information to identify one or more locations of one or more gases in the FOI, wherein the visible image depicts the one or more locations of the one or more gases in the FOI; wherein the visible light projector comprises: a visible light source configured to generate a beam of visible light; a first scanner configured to scan the visible light into an area covering the FOI; and a controller configured to control at least one of the visible light source and the first scanner to project the visible frame image; and further comprising: an IR light projector comprising: an IR laser source configured to generate a beam of IR light; and a second scanner configured to scan the beam of the IR light into a two-dimensional projecting pattern covering the FOI; wherein the controller is configured to control at least one of the IR laser source and the second scanner to project the beam of the IR light into the two-dimensional projecting pattern in the FOI; and wherein the IR detector generates the IR light distribution information based on the IR light scanned in the two-dimensional projecting pattern. an infrared detector configured to monitor a presence of one or more gases in a field-of-interest, FOI, wherein the IR detector generates IR light distribution information within the FOI to be analyzed to identify the presence of one or more gases for a gas leak detection; further comprising a visible light projector configured: (i) to project, onto objects in the FOI, a visible frame image that frames an outer edge of the FOI during the gas leak detection, and (ii) to project, onto objects in the FOI, a visible image based on analysis by a processor, said processor configured to analyze the IR light distribution information to identify one or more locations of one or more gases in the FOI, wherein the visible image depicts the one or more locations of the one or more gases in the FOI; (i) to project, onto objects in the FOI, a visible frame image that frames an outer edge of the FOI during the gas leak detection, and (ii) to project, onto objects in the FOI, a visible image based on analysis by a processor, said processor configured to analyze the IR light distribution information to identify one or more locations of one or more gases in the FOI, wherein the visible image depicts the one or more locations of the one or more gases in the FOI; wherein the visible light projector comprises: a visible light source configured to generate a beam of visible light; a first scanner configured to scan the visible light into an area covering the FOI; and a controller configured to control at least one of the visible light source and the first scanner to project the visible frame image; and further comprising: a visible light source configured to generate a beam of visible light; a first scanner configured to scan the visible light into an area covering the FOI; and a controller configured to control at least one of the visible light source and the first scanner to project the visible frame image; and further comprising: an IR light projector comprising: an IR laser source configured to generate a beam of IR light; and a second scanner configured to scan the beam of the IR light into a two-dimensional projecting pattern covering the FOI; wherein the controller is configured to control at least one of the IR laser source and the second scanner to project the beam of the IR light into the two-dimensional projecting pattern in the FOI; and wherein the IR detector generates the IR light distribution information based on the IR light scanned in the two-dimensional projecting pattern. an IR laser source configured to generate a beam of IR light; and a second scanner configured to scan the beam of the IR light into a two-dimensional projecting pattern covering the FOI; wherein the controller is configured to control at least one of the IR laser source and the second scanner to project the beam of the IR light into the two-dimensional projecting pattern in the FOI; and wherein the IR detector generates the IR light distribution information based on the IR light scanned in the two-dimensional projecting pattern.