`OpticalTube`

An OpticalTube is the optical tube assembly, or OTA: the lens or mirror that collects the light. It has no driver. Two OpticalTrains can name one tube, such as an imaging train and an off-axis guider.

spec

The tube’s optics.

Field	Type	Required	Description
`telescope`	string	yes	The name of the `Telescope` that the tube is on. Pattern: `^[a-z0-9]([-a-z0-9.]*[a-z0-9])?$`.
`aperture`	number	yes	The diameter of the lens or the primary mirror, in millimeters.
`focalLength`	number	yes	The focal length, in millimeters, with any reducer or barlow that stays on the tube.

status

What the operator observes. The operator writes it, and a person reads it.

Field	Type	Required	Description
`observedGeneration`	integer	no	The `metadata.generation` of the spec that the operator last acted on.
`conditions`	[]object	no	`ParentFound` is `False` when the `Telescope` or its `Observatory` does not exist.
`display`	object	no	The spec as a person reads it, with its units, for the printer columns.
`trains`	[]string	no	Each `OpticalTrain` that names this tube.

status.conditions[]

One condition, in the shape of metav1.Condition.

Field	Type	Required	Description
`type`	string	yes	The condition’s name, such as `Ready`.
`status`	string	yes	Whether the condition holds: `True`, `False`, or `Unknown`. One of: `True`, `False`, `Unknown`.
`observedGeneration`	integer	no	The `metadata.generation` of the spec that the condition reflects.
`reason`	string	yes	One word in CamelCase for the cause.
`message`	string	yes	The cause, for a person to read. It can be empty.
`lastTransitionTime`	string	yes	When `status` last changed. A write with the same status keeps this time.

status.display

The spec as a person reads it, with its units, for the printer columns.

Field	Type	Required	Description
`aperture`	string	no	The aperture, such as `80 mm`.
`focalLength`	string	no	The focal length, such as `480 mm`.