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Gradient index lens, optical product, optical device, glass composition for gradient index lens, and method for manufacturing gradient index lens
Gradient index lens, optical product, optical device, glass composition for gradient index lens, and method for manufacturing gradient index lens
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机译：梯度折射率透镜，光学产品，光学器件，梯度折射率透镜的玻璃组合物以及梯度折射率透镜的制造方法
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摘要
PROBLEM TO BE SOLVED: To provide a gradient index lens having a large depth of field. A gradient index lens 1b has a depth of field of 1.5 to 3.0 mm. The depth of field is determined by subtracting the minimum value from the maximum value of the working distance. At the working distance, the value of the modulation transfer function MTF at a spatial frequency of 6 lines/mm is 30% or more. [Selection diagram] Figure 1
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