A method for analyzing a blood sample, comprising the steps of: depositing a blood sample into an analysis chamber adapted to quiescently hold the blood sample for analysis, the chamber defined by a first panel and a second panel, both of which panels (12, 16) are transparent, which blood sample has one or more first constituents and one or more second constituents, which second constituents are different from the first constituents; admixing a colorant with the blood sample, which colorant is operative to cause the first constituents and second constituents to fluoresce upon exposure to predetermined first wavelengths of light, and which colorant is operative to absorb light at one or more predetermined second wavelengths of light; illuminating at least a portion of the blood sample containing the first constituents and the second constituents selectively at the first wavelengths and at the second wavelengths; imaging the at least a portion of the blood sample, including producing image signals indicative of fluorescent emissions from the first constituents and the second constituents and the optical density at the second wavelengths of the first constituents and the second constituents; determining one or more fluorescent emission values for each of the first constituents and second constituents using the image signals; determining one or more optical density values at the second wavelengths for each of the first constituents and second constituents, which optical density is a function of the colorant absorbed by the constituents, using the image signals; and identifying the first constituents and the second constituents using the determined fluorescent emission and optical density values. depositing a blood sample into an analysis chamber adapted to quiescently hold the blood sample for analysis, the chamber defined by a first panel and a second panel, both of which panels (12, 16) are transparent, which blood sample has one or more first constituents and one or more second constituents, which second constituents are different from the first constituents; admixing a colorant with the blood sample, which colorant is operative to cause the first constituents and second constituents to fluoresce upon exposure to predetermined first wavelengths of light, and which colorant is operative to absorb light at one or more predetermined second wavelengths of light; illuminating at least a portion of the blood sample containing the first constituents and the second constituents selectively at the first wavelengths and at the second wavelengths; imaging the at least a portion of the blood sample, including producing image signals indicative of fluorescent emissions from the first constituents and the second constituents and the optical density at the second wavelengths of the first constituents and the second constituents; determining one or more fluorescent emission values for each of the first constituents and second constituents using the image signals; determining one or more optical density values at the second wavelengths for each of the first constituents and second constituents, which optical density is a function of the colorant absorbed by the constituents, using the image signals; and identifying the first constituents and the second constituents using the determined fluorescent emission and optical density values.