Stereo lens apparatus and image pickup apparatus

An image pickup apparatus to which a stereo lens apparatus including two optical systems arranged in parallel is detachably attachable, the image pickup apparatus comprising a single image sensor configured to capture two optical images formed by the two optical systems,

• wherein each of the two optical systems includes, in order from an object side to an image side, a first lens unit, a second lens unit, and a third lens unit,
• wherein an optical path is bent at a position between the first lens unit and the second lens unit and at a position between the second lens unit and the third lens unit in each of the two optical systems so that an inter-optical axis distance between two third lens units of the two optical systems is narrower than an inter-optical axis distance between two first lens units of the two optical systems,
• wherein part of one holding mechanism of two holding mechanisms that are configured to respectively hold the two third lens units is located in a concave portion provided on the other holding mechanism, and part of the other holding mechanism is located in the concave portion provided on the one holding mechanism,
• wherein each of the two holding mechanisms includes a spring configured to generate a biasing force for holding the third lens unit, and
• wherein the part of each holding mechanism includes the spring and a hook to which the spring is hooked.

A stereo image pickup apparatus comprising a stereo lens apparatus including two optical systems arranged in parallel,

• wherein each of the two optical systems includes, in order from an object side to an image side, a first lens unit, a second lens unit, and a third lens unit,
• wherein an optical path is bent at a position between the first lens unit and the second lens unit and at a position between the second lens unit and the third lens unit in each of the two optical systems so that an inter-optical axis distance between two third lens units of the two optical systems is narrower than an inter-optical axis distance between two first lens units of the two optical systems,
• wherein part of one holding mechanism of two holding mechanisms that are configured to respectively hold the two third lens units is located in a concave portion provided on the other holding mechanism, and part of the other holding mechanism is located in the concave portion provided on the one holding mechanism,
• wherein each of the two holding mechanisms includes a spring configured to generate a biasing force for holding the third lens unit, and
• wherein the part of each holding mechanism includes the spring and a hook to which the spring is hooked.