초록 ▼

A fluid-flow balancer mimics the air-flow resistance of a component omitted from an electronic system so that omission causes little or no disruption to or alteration of the flow of a cooling fluid. This prevents overheating that such disruption or alteration may otherwise cause. In addition, the fl

A fluid-flow balancer mimics the air-flow resistance of a component omitted from an electronic system so that omission causes little or no disruption to or alteration of the flow of a cooling fluid. This prevents overheating that such disruption or alteration may otherwise cause. In addition, the fluid-flow balancer may also mimic the EMI suppression characteristics of the omitted component. Thus, a system not fully populated with components can still be adequately cooled and shielded without changing the cooling or shielding systems.

대표청구항 ▼

A fluid-flow balancer mimics the air-flow resistance of a component omitted from an electronic system so that omission causes little or no disruption to or alteration of the flow of a cooling fluid. This prevents overheating that such disruption or alteration may otherwise cause. In addition, the fl

A fluid-flow balancer mimics the air-flow resistance of a component omitted from an electronic system so that omission causes little or no disruption to or alteration of the flow of a cooling fluid. This prevents overheating that such disruption or alteration may otherwise cause. In addition, the fluid-flow balancer may also mimic the EMI suppression characteristics of the omitted component. Thus, a system not fully populated with components can still be adequately cooled and shielded without changing the cooling or shielding systems. lens unit. 11. A projection optical system as claimed in claim 1, wherein the front lens unit is rotatable along a sphere having a center on an optical axis of the front lens unit. 12. A projection optical system as claimed in claim 1, wherein the rear lens unit includes a first focusing unit having a positive optical power which is moved along the optical axis to achieve focusing and a second focusing unit having a positive optical power which is moved along the optical axis to correct a focusing error produced as a result of the first focusing unit being moved. 13. A projection optical system that, by using projection light emanating from a light valve illuminated by illumination light, projects an enlarged image of an image displayed on the light valve onto a screen, comprising, from a conjugate enlargement side: a front lens unit having a negative optical power as a whole and including at least one aspherical surface, the front lens unit having a first lens element disposed at a conjugate-enlargement-side end thereof and having a second lens element disposed on a conjugate reduction side of the first lens element, the first and second lens elements both having a negative optical power; optical path turning means, including a reflecting surface, for turnin