25-08-2023 дата публикации
Номер: CN116643376A
Принадлежит:
The invention discloses a multiband projection system, which comprises an optical lens group and a diaphragm, and is characterized in that the optical lens group comprises a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, a seventh lens, an eighth lens and a ninth lens which are sequentially arranged from an object plane to an image plane along an optical axis. The first lens, the second lens, the fourth lens, the fifth lens, the eighth lens and the ninth lens all have positive focal power, and the third lens, the sixth lens and the seventh lens all have negative focal power. The working wavelength of the multiband projection system meets the following conditions: lambda is greater than or equal to 350 nm and less than or equal to 450 nm, NA is greater than or equal to 0.09 and less than or equal to 0.12, and Y is greater than or equal to 20 mm and less than or equal to 30 mm. According to the multiband projection system provided by the invention, the ...
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