摘要:
Disclosed herein is a zoom lens, wherein a stop moves in an optical axis direction n in a phase of zooming; a position of the stop in a telephoto end is located on an object side with respect to a position of the stop in a wide-angle end; an opening size of the stop is controlled in conjunction with the zooming so that an open F number becomes approximately constant in a range from the wide-angle end to a specific intermediate focal length; the opening size of the stop is made approximately constant in a range from the specific intermediate focal length to the telephoto end so that the open F number is changed; and the specific intermediate focal length fulfills the following conditional expression (1), wide-angle end focal length×1.5
摘要:
A lens barrel includes: a barrel body; a mount that is attached to an end of the barrel body and has a connection portion to be connected to an imaging apparatus body; and a substrate that is disposed on an attachment surface of the mount that is attached to the barrel body and on which a controller for controlling the action of the barrel body is formed, wherein the mount has a locking member that protrudes from the attachment surface and locks an operation member for operating a mechanism in the barrel body, and the substrate has a clearance that prevents interference with the locking member.
摘要:
A lens barrel includes a focus cam ring that holds a focus lens group and moves in the optical axis direction of the focus lens group while rotating along a cam groove in response to a focusing operation, and a fixed tube having a fitting raised portion that can pivot the focus cam ring in the rotational direction thereof and movably supports the focus cam ring in the optical axis direction. The focus cam ring has a position restrictor that can engage the fitting raised portion, and the position restrictor includes a rotational-direction restrictor that restricts the position of the focus cam ring in the rotational direction and an optical axis-direction restrictor that restricts the position of the focus cam ring in the optical axis direction.
摘要:
A lens barrel includes a focus cam ring that holds a focus lens group and moves in the optical axis direction of the focus lens group while rotating along a cam groove in response to a focusing operation, and a fixed tube having a fitting raised portion that can pivot the focus cam ring in the rotational direction thereof and movably supports the focus cam ring in the optical axis direction. The focus cam ring has a position restrictor that can engage the fitting raised portion, and the position restrictor includes a rotational-direction restrictor that restricts the position of the focus cam ring in the rotational direction and an optical axis-direction restrictor that restricts the position of the focus cam ring in the optical axis direction.
摘要:
A gas-mixture-ignition-time estimation apparatus for an internal combustion engine estimates the temperature of a premixed gas mixture for PCCI combustion (i.e., cylinder interior temperature Tg), while relating it to the angle CA, on the basis of a state quantity of the cylinder interior gas at the time of start of compression (CAin) (heat energy of the cylinder interior gas at the time of start of compression), the amount of a change in the state quantity of the cylinder interior gas attributable to compression in a compression stroke (minute piston work), and the heat generation quantity of a cool flame generated in PCCI combustion prior to autoignition (hot flame) (cool flame heat generation quantity Aqlto). A time when the cylinder interior temperature Tg reaches a predetermined autoignition start temperature Tig is estimated as an autoignition start time (Caig) of the premixed gas mixture related to PCCI combustion. Since the cool flame heat generation quantity Oqlto is taken into consideration, the autoignition start time related to PCCI combustion can be estimated accurately.
摘要:
A camera includes a first lens unit on which a light beam is incident from a subject, a reflective mirror for reflecting the light beam through the first lens unit, in a direction substantially perpendicular to the optical axis of the first lens unit, a first diaphragm member arranged on a surface of a lens of the first lens unit closest to the reflective mirror with the surface of the lens facing the reflective mirror, and which blocks unwanted rays of light other than the light beam that forms the image of the subject, a second lens unit on which the light beam reflected from the reflective mirror is incident, a second diaphragm member arranged between the first lens unit and the second lens unit blocks unwanted rays of light that travel outside the outermost periphery at which the light beam traveling from the first lens unit to the reflective member intersects the light beam traveling from the reflective mirror to the second lens unit, and an unwanted ray-of-light reflection prevention member arranged on the reflective mirror to prevent rays of light from being reflected from a region thereof other than the region thereof on which the light beam forming the subject image is incident.
摘要:
A water-based liquid treatment composition for metal surfaces comprises water, (A) dissolved, dispersed, or both dissolved and dispersed urethane resin, acrylic resin; or both urethane and acrylic resins; (B) dissolved, dispersed, or both dissolved and dispersed curing agent molecules; (C) dispersed silica powder; (D) dispersed oxidized polyethylene wax with an average particle size of 0.01 to 0.2 &mgr;m; and (E) dissolved, dispersed, or both dissolved and dispersed molecules that conform to the immediately following general chemical formula (I): wherein: R1 represents a C1 to C20 alkyl moiety or a C2 to C20 alkenyl moiety; R2 represents a block homo-oligomer of oxyethyleine or a block co-oligomer of oxyethylene and oxypropylene that conforms to the general chemical formula —(C2H4O)m—(C3H6)n—, wherein m represents an integer from 5 to 20 and n represents an integer from 0 to 10; R3 represents a hydrogen moiety or SO3M, where M represents a hydrogen atom, an is alkali metal ion, or an ammonium ion; and R4 represents a hydrogen atom, a C1 to C4 alkyl moiety, or a C2 to C4 alkenyl moiety. The composition contains these components in amounts such that: the total solids from components (A) and (B) constitute from 50 to 95% by weight of the total solids from components (A) through (E); the solids from component (C) constitute from 3 to 40% by weight of the total solids from components (A) through (E); the total solids from components (D) and (E) constitute from 2 to 20% by weight of the total solids from components (A) through (E); and the ratio by weight of solids from component (A) to solids from component (B) is from 4:1.0 to 49:1.00. Applying this composition over a metal surface and drying the composition into place on the surface produces an excellent resistance to corrosion in damaged regions in addition to an excellent general corrosion resistance and excellent paint adherence. Treatment in this manner is especially advantageous when applied over a pre-existing chromate conversion coating on the metal surface.
摘要:
Waterborne lubricants comprising: (A) water-soluble inorganic salt; (B) homogeneously dispersed solid lubricant; (C) at least one homogeneously emulsified substance selected from mineral oils, animal and plant oils and fats, and synthetic oils; (D) surfactant; and (E) water, in which the weight ratio (B)/(A) is from 0.05:1 to 2:1 and the weight ratio {C/(A+B)} is from 0.05:1 to 1:1, provide a one-step, highly lubricating waterborne lubricant for use in the cold plastic working of metals. This waterborne lubricant can replace the conversion coating treatment (phosphate, oxalate, etc.)+reactive soap treatment combined lubrication system now in general use and is free of the environmental issues associated with the combined lubrication system, provides for facile coating removal, and is not subject to the decline in seizure resistance caused by nonuniform add-on when large numbers of workpieces are treated together by immersion.
摘要:
The present invention provides a hair cosmetic composition containing an antibody (a) to hair or a hair extract obtained from egg yolk of poultry immunized with the hair or hair extract, and a polymer emulsion (b). The hair cosmetic composition of the invention can provide excellent properties including softness, moistened feel, and smoothness. In addition, since it is adsorbed only onto a specified part of the hair, stickiness or greasiness of the hair can be prevented. The composition also prevents occurrence of split hairs, and even repair the split hairs. These effects are not lost by repeated ordinary shampooings.
摘要:
An electrophotographic photosensitive member, has an electroconductive support, an interlayer, and a photosensitive layer provided in the order named. The interlayer contains a polyamide having a structural unit represented by the formula (I) below: ##STR1## wherein R.sub.1 is a substituted or unsubstituted alkyl group, R.sub.2 is a substituted or unsubstituted alkylene group, and n is an integer of one or more.