多看綠色真能護眼？醫解答 1件事才是關鍵
The horn antenna has a distinctive design that is enlarged towards the end. Horn antennas typically feature a directional radiation pattern with a high antenna gain of 10-20 dBi, some antennas have a higher gain such as the standard horn antenna up to 25 dBi. Horn antennas feature a low VSWR and a wide impedance bandwidth.
Double Ridged Horn Antennas are very popular from 200 MHz frequency to higher frequencies up to 40GHz. We have recently extended the usage frequency of this antenna up to 60 GHz.
This antenna's operating frequency has recently been increased to 60 GHz. The research process for the product line is still ongoing but is planned to be completed this year. To receive the most recent price and technical information on the new product, please contact us for more information.
Double Ridged Horn Antennas are suitable for both transmitting and receiving purposes, with applications:
- - Antenna measurement
- - Communication systems
- - Satellite tracking systems
- - Radar Detection System
- - Surveillance System
- - Electromagnetic Compatibility Testing (EMC test)
Recommended Accessories
- - Antenna Tripod: easy and fast-changing position. 100% stable after installing.
- - SMA Cable: High-quality special SMA cable
Learn More
SUMMARY TABLE OF DOUBLE-RIDGED HORN ANTENNA (HA-SERIES)
常聽到「多看綠色能護眼」的說法，甚至還有人因此將電腦螢幕改成綠色，究竟此舉是否真有效？對此，眼科醫師謝嫣文指出，不論使用手機或電腦，只要都是近距離用眼，那看什麼顏色都沒有太大差別。而真正護眼關鍵在於「距離」，如看遠方天際線、遠方綠色植物，才能讓睫狀肌適時調節跟放鬆。
謝嫣文在眼科診所粉專發文表示，若從環境心理學觀點來看，綠色被視為一種有助於紓緩眼睛疲勞的冷色調。在大自然中，觀賞綠色植物可降低眼睛的焦慮感，提供視覺上的寧靜感。另外，在美學療法中，觀賞綠色植物被視為一種能夠放鬆眼神、緩解視覺疲勞的方法，有助於提升整體視覺體驗。
談及綠色跟視力的關聯，謝嫣文說明，綠色對人類眼睛的對焦系統而言，是最舒適的顏色。因綠色的光波波長，正好是可見光中，眼睛最敏感的波段，所以對焦在視網膜之前，能讓睫狀肌和水晶體處於較為放鬆的狀態。
不過，謝嫣文強調，若使用手機或電腦，都是近距離用眼，視網膜肌肉依然會處於緊繃狀態，那無論看什麼顏色，其實不會有太大差別。
至於什麼方式才能達到護眼效果？謝嫣文說，關鍵就在於距離，如看遠方天際線、看遠方綠色植物，讓睫狀肌可以適時調節跟放鬆，才是最正確的做法。
發表意見
中時新聞網對留言系統使用者發布的文字、圖片或檔案保有片面修改或移除的權利。當使用者使用本網站留言服務時，表示已詳細閱讀並完全了解，且同意配合下述規定：
違反上述規定者，中時新聞網有權刪除留言，或者直接封鎖帳號！請使用者在發言前，務必先閱讀留言板規則，謝謝配合。