The development of integral SL system with low cost for fabrication small size object has important significance, and
dynamic pattern generator is the key component for a integral SL system. To set up the dynamic pattern generator using
digital micro-mirror device (DMD), an optical imaging system, which produces Section pattern of a object on working
plane and solidifies photo curable resin, has been designed. The optical imaging system consists of two components. The
component 1 is made up of 3 positive lenses, and the component 2 consists of a negative lens, two positive lenses and a
aperture. To reduce the coma and astigmatism of the image produced with the optical imaging system, the aperture
position is optimized with soft ZEMAX. The best location for the stop is 1 mm before the second lens in component 2.
As a result, the coma is 3.7 wavelengths, and astigmatism is -0.18 wavelengths. The design of the optical imaging
system lays a foundation for set-up low-cost integral SL system.
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