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have a positive focal length and converges the incident light. This type lens forms both real and virtual images. Real image-focused, Virtual Image-magnifi...
Cylindrical lenses focus incoming light in one dimension only, such as in transforming a point image into a line image or changing the height of an image without changing its width or vice versa...
POSITIVE MENISCUS, NEGATIVE MENISCUS
Positive meniscus lenses
are designed to minimize spherical aberration and are usually used in small fnumber applications (f#〈2.5). For 2.5 f#〈10, meniscus lenses can also im...