Dual　plane　on-axis　digital　holography　based　on　LCOS　spatial　light　modulator　with　the　benefits　of　dual　wavelength　phase　unwrapping　method　is　presented.　Computer-generated　chirp　like　complex　reflectance　were　displayed　on　LCOS　spatial　light　modulator　for　recording　of　holograms　at　two　slightly　displaced　planes　for　two　wavelengths　which　were　later　processed　to　suppress　the　dc　term　and　twin　image　in　the　reconstructed　image　of　each　wavelength.　The　dual　wavelength　phase　unwrapping　method　is　used　on　the　reconstructed　wrapped　phases　of　each　wavelength　to　successfully　unwrap　the　surface　profile　and　result　is　verified　by　comparing　it　with　measurement　made　by　the　optical　profiling　system.