A flow cytometer comprising: a compact light detection module including an input channel; a first image array having a transparent block, a plurality of micro-mirrors (110A-110E) in a row coupled to a first side of the transparent block, and a plurality of filters (112A-112E) in a row coupled to a second side of the transparent block opposite the first side, wherein the input channel images light from an aperture at a fiber to a surface of a first filter of the plurality of filters (112A-112E), wherein each of the plurality of filters (112A-112E) reflects light to one of the plurality of micro-mirrors and passes light of a differing wavelength range and each of the plurality of micro-mirrors reflects light to one of the plurality of filters (112A-112E), such that incident light into the image array zigzags back and forth between consecutive filters of the plurality of filters (112A-112E) and consecutive micro-mirrors of the plurality of micro-mirrors, wherein a radius of curvature of each of the plurality of micro-mirrors directs light onto even filters and reimages light onto odd filters of the plurality of filters (112A-112E) along the row, wherein a radius of curvature of the plurality of micro-mirrors forms a focal length equal to the beam path length from micro-mirror to opposing filter; and a first plurality of detector channels (113A-113E, 714) in a row forming a first detector chain adjacent the first image array and in light communication with the plurality of filters (112A-112E) of the first image array, wherein each detector channel includes a focusing lens, and a photo detector; a collection lens with a first side facing a sample chamber and an opposing second side, the first side of the collection lens having a first numeric aperture and the second side of the collection lens having a second NA less than the first NA; and an optical fiber with a first end aligned with an optical axis of the collection lens and a second end aligned with an optical axis of the input channel of the compact detection module, the optical fiber having a fiber NA greater than or equal to the second NA of the collection lens. an input channel; a first image array having a transparent block, a plurality of micro-mirrors (110A-110E) in a row coupled to a first side of the transparent block, and a plurality of filters (112A-112E) in a row coupled to a second side of the transparent block opposite the first side, wherein the input channel images light from an aperture at a fiber to a surface of a first filter of the plurality of filters (112A-112E), wherein each of the plurality of filters (112A-112E) reflects light to one of the plurality of micro-mirrors and passes light of a differing wavelength range and each of the plurality of micro-mirrors reflects light to one of the plurality of filters (112A-112E), such that incident light into the image array zigzags back and forth between consecutive filters of the plurality of filters (112A-112E) and consecutive micro-mirrors of the plurality of micro-mirrors, wherein a radius of curvature of each of the plurality of micro-mirrors directs light onto even filters and reimages light onto odd filters of the plurality of filters (112A-112E) along the row, wherein a radius of curvature of the plurality of micro-mirrors forms a focal length equal to the beam path length from micro-mirror to opposing filter; and a transparent block, a plurality of micro-mirrors (110A-110E) in a row coupled to a first side of the transparent block, and a plurality of filters (112A-112E) in a row coupled to a second side of the transparent block opposite the first side, wherein the input channel images light from an aperture at a fiber to a surface of a first filter of the plurality of filters (112A-112E), wherein each of the plurality of filters (112A-112E) reflects light to one of the plurality of micro-mirrors and passes light of a differing wavelength range and each of the plurality of micro-mirrors reflects light to one of the plurality of filters (112A-112E), such that incident light into the image array zigzags back and forth between consecutive filters of the plurality of filters (112A-112E) and consecutive micro-mirrors of the plurality of micro-mirrors, wherein a radius of curvature of each of the plurality of micro-mirrors directs light onto even filters and reimages light onto odd filters of the plurality of filters (112A-112E) along the row, wherein a radius of curvature of the plurality of micro-mirrors forms a focal length equal to the beam path length from micro-mirror to opposing filter; and a first plurality of detector channels (113A-113E, 714) in a row forming a first detector chain adjacent the first image array and in light communication with the plurality of filters (112A-112E) of the first image array, wherein each detector channel includes a focusing lens, and a photo detector; a collection lens with a first side facing a sample chamber and an opposing second side, the first side of the collection lens having a first numeric aperture and the second side of the collection lens having a second NA less than the first NA; and an optical fiber with a first end aligned with an optical axis of the collection lens and a second end aligned with an optical axis of the input channel of the compact detection module, the optical fiber having a fiber NA greater than or equal to the second NA of the collection lens.