Abstract: An ophthalmic device including an illumination module which scans light across a region of the retina of an a eye when the pupil is disposed at a focal point of the illumination module. The ophthalmic device further comprises components (2, 3-1, 4-1) for: aligning the pupil with the focal point; monitoring a position of the pupil relative to the focal point and maintaining the alignment based on the monitored position; aligning a scan location of the illumination module on the retina to a target scan location while the alignment of the pupil with the focal point is being maintained, wherein the illumination module performs scan at the target scan location The ophthalmic device further maintains the scan location at the target scan location while the alignment of the pupil with the focal point is being maintained, using scan location correction information based on retinal feature information.

Abstract: A method of producing an assembly of a connector block (1, 21, 40) and a detonator (5, 25, 41) suitable for retaining at least one shock tube (4, 24) adjacent to a percussion-actuation end (15, 26) of the detonator, and to an assembly thus produced and a connector block therefor. The method comprising inserting a detonator into a connector block having a housing (2, 22, 40) provided with a bore (13, 31, 44), positioning the detonator in the bore of the housing so that the percussion-actuation end of the detonator is positioned adjacent to a slot (14, 35) for receiving the shock tubes; and fixing the detonator in the housing. The detonator is fixed in the housing by causing a body of material (10) to flow plastically into the recess in the detonator and to harden therein to form a locking element fixed to the housing, thereby preventing accidental movement of the detonator within the connector block.

Abstract: A method of producing an assembly of a connector block (1, 21, 40) and a detonator (5, 25, 41) suitable for retaining at least one shock tube (4, 24) adjacent to a percussion-actuation end (15, 26) of the detonator, and to an assembly thus produced and a connector block therefor. The method comprising inserting a detonator into a connector block having a housing (2, 22, 40) provided with a bore (13, 31, 44), positioning the detonator in the bore of the housing so that the percussion-actuation end of the detonator is positioned adjacent to a slot (14, 35) for receiving the shock tubes; and fixing the detonator in the housing. The detonator is fixed in the housing by causing a body of material (10) to flow plastically into the recess in the detonator and to harden therein to form a locking element fixed to the housing, thereby preventing accidental movement of the detonator within the connector block.

Abstract: A gate valve has downstream shear and seal capabilities in which the gate will stroke far enough to cover the downstream seat interface, and has a single shearing surface for shearing of a wireline. The gate has an inlay of a hard ductile material such as Stellite® along the shearing edge of the gate. The gate also has a coating of an extremely hard material such as tungsten carbide on the sealing surface of the gate. The seat also has an inlay of a hard ductile material such as Stellite® along its shearing edge. The gate fully covers and seals the upstream seat interface after the shear media has fallen below the upstream gate/seat interface. An upstream lip seal for the upstream seat ring is energized to seal on upstream pressure.