Two monitor TFCCD lenses are designed with foci 50mm and F2.8 used for factory with 1024×1024pixels and image element 15μm×15μm.One is traditionally overall spherical lens,the other is a lens including two axial gradient index medium.The lenses are compared and found that the latter gets rid of two singlets but image quality improving a lot.RMS decrease from 12.67μm to 8.86μm,minimum MTF at 35lp/mm increase from 0.18 to 0.43 and distortion at maximum field decrease from-5.21% to 0.76%.