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- In optics, a simple lens or singlet lens is a lens consisting of a single simple element. Typical examples include a magnifying glass or a lens in a pair of simple reading glasses. Simple lenses are prone to aberrations, especially chromatic aberration. They cannot be used for precise imaging and make poor camera lenses. They are commonly used for laser applications, however, where the beams are both monochromatic (minimizing chromatic aberration) and narrow (minimizing spherical aberration). Some cameras with fixed lenses have been made using a simple lens, usually a meniscus lens with the convex face facing outward. In such examples the lens aperture is made small and in some cases (such as the Kodak Brownie 127 camera), the film plane is curved to reduce the impact of aberrations. (en)
- 單鏡或 獨鏡，在光學上是只有一個簡單透鏡的元素，典型的例子是放大鏡或一隊都由單一鏡片構成的閱讀鏡。 簡單的透鏡很容易產生色像差和其他不同的像差，因此不可能在要求精確的光學系統中單獨使用。 然而，在一些的照相機會使用單獨的透鏡，通常是凸面朝外的新月型透鏡。這一類型的例子有柯達公司的，是藉由底片的彎曲來減少影像變形的衝擊。 (zh)
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- 單鏡或 獨鏡，在光學上是只有一個簡單透鏡的元素，典型的例子是放大鏡或一隊都由單一鏡片構成的閱讀鏡。 簡單的透鏡很容易產生色像差和其他不同的像差，因此不可能在要求精確的光學系統中單獨使用。 然而，在一些的照相機會使用單獨的透鏡，通常是凸面朝外的新月型透鏡。這一類型的例子有柯達公司的，是藉由底片的彎曲來減少影像變形的衝擊。 (zh)
- In optics, a simple lens or singlet lens is a lens consisting of a single simple element. Typical examples include a magnifying glass or a lens in a pair of simple reading glasses. Simple lenses are prone to aberrations, especially chromatic aberration. They cannot be used for precise imaging and make poor camera lenses. They are commonly used for laser applications, however, where the beams are both monochromatic (minimizing chromatic aberration) and narrow (minimizing spherical aberration). (en)
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