LENS UNIT
Patent Information
- Authority / Receiving Office
- DE · DE
- Patent Type
- Patents
- Current Assignee / Owner
- Filing Date
- 2018-05-11
- Publication Date
- 2026-04-15
AI Technical Summary
The close contact between the image side lens and the flange portion in lens units makes it difficult to accurately measure airtightness, especially when the seal member is damaged, not attached, or mispositioned, leading to unintended air leakage and difficulty in performing airtightness tests.
A lens unit design with an annular flange portion and air holes on the lens barrel allows air to fill the barrel even if the image side lens is in close contact, enabling precise airtightness measurement by introducing air through these holes, and a gap is formed between the optical filter and the air hole to release adhesive outgas.
Enables accurate airtightness testing of the seal member by allowing air to flow through the air holes, ensuring reliable airtightness assessment and preventing adhesive fogging on the optical filter.