理学 水声探测 释 caustic 焦散 在射线声学理论中，使聚焦因子趋于无穷大的现象。使聚焦因子趋于无穷大的点称为焦散点，其邻近区域是射线管聚焦所致的声强急剧增强区，称为焦散区。射线族上由临近声线交聚点（焦散点）所形成的包络线称为焦散线，而由临近声线交聚线（焦散线）所形成的包络面称为焦散面。
计算机应用 计算机辅助设计与图形学 释文 caustics 焦散
- Hill determinant
- Hill determinantal equation
- Hill differential equation
- hill-dropplanter
- Hille
- Hill element
- Hillel the elder
- Hill equation
- hiller
- Hille-Tamarkin operator
- Hille-Yosida theorem
- Hill method of solution
- hill myna
- Hill of No Return
- Hill operator
- Hill problem
- Hill reaction
- hills
- Hill's approximation
- Hillsborough
- Hill's criteria for causality
- hill shading
- hill-side ditch
- Hill sphere
- Hill stability