TWI676008B - 雷射指示器脈衝偵測器 - Google Patents

雷射指示器脈衝偵測器 Download PDF

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TWI676008B
TWI676008B TW105109633A TW105109633A TWI676008B TW I676008 B TWI676008 B TW I676008B TW 105109633 A TW105109633 A TW 105109633A TW 105109633 A TW105109633 A TW 105109633A TW I676008 B TWI676008 B TW I676008B
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喬納森 奈賽米
Jonathan NAZEMI
羅伯特 羅茲洛取
Robert Rozploch
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美商無限傳感有限公司
Sensors Unlimited, Inc.
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Abstract

一種雷射指示器脈衝偵測器包括一經組態以將雷射信號轉換成電信號之InGaAs光偵測器。一讀出積體電路(ROIC)可操作地連接至該InGaAs光偵測器以調節來自該InGaAs光偵測器之電信號。該ROIC可操作地連接至一周邊裝置，該周邊裝置包括經組態以處理來自該ROIC之信號且提供脈衝偵測、解碼及追踪的一或多個模組。在另一態樣中，一種雷射指示器脈衝偵測器包括一經組態以將雷射信號轉換成電信號之二維光偵測器陣列。一如上文所描述之ROIC可操作地連接至該二維光偵測器陣列。

Description

雷射指示器脈衝偵測器
本揭示案係關於雷射指示，且更明確言之，係關於對來自脈衝雷射指示器之脈衝雷射簽字的偵測。
此項技術中已知有各種裝置及方法用於雷射光點追踪。傳統雷射指示系統包括雷射指示器，該雷射指示器用於照射相關物件或對相關物件作畫。雷射指示器根據如由使用者指定之設定以預定脈衝串之形式發出雷射脈衝。追踪裝置可偵測雷射光點且對其進行追踪。
此類習知方法及系統就其既定目的而言，通常被認為係令人滿意的。然而，此項技術中仍需要改良之雷射指示器脈衝偵測。本揭示案提供符合此種需要之解決方案。
一種雷射指示器脈衝偵測器包括經組態以將雷射信號轉換成電信號之砷化銦鎵(InGaAs)光偵測器。讀出積體電路(ROIC)可操作地連接至該InGaAs光偵測器以調節來自該InGaAs光偵測器之電信號。
該InGaAs光偵測器可經組態以接收直至且包括1700nm之波長。舉例而言，預期到該InGaAs光偵測器可經組態以偵測1064nm波長及/或1550nm波長之雷射光。
該ROIC可操作地連接至一周邊裝置，該周邊裝置包括經組態以處理來自該ROIC之信號且提供脈衝偵測、解碼及追踪的一或多個電子模 組。該ROIC可經組態以在20kHz之頻率下自該InGaAs光偵測器進行讀取。亦預期到該ROIC可操作地連接至該InGaAs偵測器以調節該等電信號以便在單獨之模組中同時偵測、追踪及解碼多個雷射光點。濾波器組合件可光學地耦接至該InGaAs光偵測器以改良信號雜訊比。
在另一態樣中，一種雷射指示器脈衝偵測器包括經組態以將雷射信號轉換成電信號之二維光偵測器陣列。一ROIC可操作地連接至該二維光偵測器陣列以調節來自該二維陣列之信號以便在單獨之模組中偵測、追踪及解碼該等電信號中之脈衝碼。
該二維光偵測器陣列可包括複數列及複數行光偵測器。舉例而言，該二維陣列可包括光偵測器之至少一32乘32陣列。該二維光偵測器陣列可包括InGaAs。該InGaAs可經組態以接收直至且包括1.7微米之波長。濾波器組合件可光學地耦接至該二維光偵測器陣列以改良信號雜訊比。
該ROIC可具有適於自該二維光偵測器陣列讀取圖框的至少20,000fps之圖框速率。預期到該ROIC可操作地連接至該二維光偵測器陣列以同時追踪及解碼多個雷射光點。
根據以下對較佳實施例之詳細描述且結合諸圖來理解，本揭示案之系統及方法的此等及其他特徵對於熟習此項技術者而言將變得更顯而易見。
10‧‧‧標靶
20‧‧‧雷射指示器
30‧‧‧入射雷射射束
100‧‧‧偵測器
102‧‧‧二維光偵測器陣列
104‧‧‧讀出積體電路(ROIC)
106‧‧‧光學組合件
108‧‧‧雷射光點
110‧‧‧雷射光點
112‧‧‧輔助電子器件
為了使熟習本揭示案所屬技術之人員在無需進行過度實驗之情况下會容易地理解如何製作及使用本揭示案之裝置及方法，將在下文參照某些圖式來詳細地描述本揭示案之較佳實施例，其中：圖1為根據本揭示案建構的雷射指示器脈衝偵測器之示例性實施例的示意圖，示出了雷射指示器及標靶；圖2為圖1所示之脈衝偵測器的示意圖，示出了具有像素之二維陣 列的焦面陣列(FPA)；及圖3為圖2所示之焦面陣列的示意圖，示出了像素之二維陣列上的兩個雷射光點。
現將參考諸圖，在諸圖中，相同元件符號標示本揭示案之相同結構特徵或態樣。為了進行闡釋及說明且不帶限制性，根據本揭示案之雷射指示器脈衝偵測器之示例性實施例的局部視圖示於圖1中且通常用元件符號100指示。如將描述，根據本揭示案之脈衝偵測器的其他實施例或其態樣提供於圖2至圖3中。本文中描述之系統及方法可用於偵測及解碼脈衝雷射信號。
可藉由雷射指示器20來照射標靶10或對標靶10作畫。在圖1中，用元件符號30來標示來自雷射指示器20之入射雷射射束。如藉由圖1中之虛綫所指示，一部分射束30自標靶反射。偵測器100接收一部分自標靶10反射之雷射。雷射指示器20可對射束30施以脈衝使之帶有預定碼，且可解碼由雷射指示器100接收到之脈衝以將標靶資訊提供給使用偵測器100之人或系統。
現參考圖2，偵測器100包括經組態以將雷射信號轉換成電信號的光偵測器(亦即，焦面陣列(FPA)中之像素)之二維陣列102。讀出積體電路(ROIC 104)可操作地連接至二維光偵測器陣列102以調節來自二維陣列102之電壓及電信號以便在單獨之模組中偵測、追踪及解碼來自二維陣列102之電信號中的脈衝碼。
二維光偵測器陣列102包括複數列及複數行光偵測器。熟習此項技術者將容易瞭解到，可使用任何陣列幾何形狀，且圖2及圖3中示意性地示出之矩形陣列僅為一個實例。預期到合適之二維陣列102可包括(例如)光偵測器之至少一32乘32陣列。二維陣列102由InGaAs形成。InGaAs可經組態(例如，可調整砷化銦與砷化鎵之相對量)以接收直至 且包括1.7微米之波長，例如經最佳化而接收1064nm波長輻射、1550nm波長輻射或任何其他合適之波長的InGaAs。
光學組合件106光學地耦接至二維陣列102，且可包括用於改良信號雜訊比之一或多個濾波器組合件及/或用於由入射輻射在二維陣列102上形成雷射光點之影像的透鏡組合件，該入射輻射(例如)係來自一或多個指示器20且由一或多個標靶10反射出來。舉例而言，光學組合件106可包括用於最佳化雷射能量之集合的單個單元透鏡或透鏡陣列及在二維陣列102前面的用於改良信號雜訊雷射偵測之窄頻帶濾波器。
圖3示意性地示出了在二維陣列102上接收到之兩個雷射光點108及110的影像。二維陣列102及ROIC 104可用於同時偵測、追踪及解碼多個雷射光點。此展示了相較於使用象限組態之傳統雷射脈衝解碼器的顯著優點，因為可在二維空間中以明顯較高之空間解析度來追踪雷射光點108及110，藉此允許使用者或系統更精確地確定脈衝在二維空間中之位置。
再次參考圖2，ROIC 104可具有適於自二維陣列102讀取順序影像圖框的(例如)至少20,000fps(20kHz)之圖框速率。此速率允許ROIC 104在二維陣列102上成像之雷射光點中偵測脈衝碼。當來自指示器20之雷射能量入射於二維陣列102上時，在FPGA或類似者內處理信號以確定二維陣列102上偵測到脈衝之位置。輔助電子器件112(包括FPGA)被連接上以自ROIC 104接收資料，且可包括(例如)用於控制引導或追踪系統、用於覆蓋關於來自單獨之成像裝置的影像之雷射光點資訊或類似操作的額外資料處理組件及輸出連接器/介面。
如上文所描述及諸圖中所示的本揭示案之方法及系統提供具有優良特性之雷射脈衝偵測器，該等優良特性包括以高空間解析度來追踪及解碼多個雷射光點。雖然已參考較佳實施例示出及描述了本揭示案之設備及方法，但熟習此項技術者將容易瞭解到，在不脫離本揭示 案之範疇的情况下可對其進行變更及/或修改。

Claims (13)

  1. 一種雷射指示器脈衝偵測器，包括：一InGaAs光偵測器，該InGaAs光偵測器經組態以將雷射信號轉換成電信號；及一ROIC，該ROIC可操作地連接至該InGaAs光偵測器以調節來自該InGaAs光偵測器之電信號，其中該ROIC可操作地連接至該InGaAs光偵測器以調節信號以便在一單獨之模組中同時偵測、追踪及解碼多個雷射光點。
  2. 如請求項1之雷射指示器脈衝偵測器，其中該InGaAs光偵測器經組態以接收直至且包括1700nm之波長。
  3. 如請求項1之雷射指示器脈衝偵測器，其中該InGaAs光偵測器經組態以偵測1064nm波長之雷射光。
  4. 如請求項1之雷射指示器脈衝偵測器，其中該InGaAs光偵測器經組態以偵測1550nm波長之雷射光。
  5. 如請求項1之雷射指示器脈衝偵測器，其中該ROIC經組態以在20kHz之一頻率下自該InGaAs光偵測器進行讀取。
  6. 如請求項1之雷射指示器脈衝偵測器，進一步包括一濾波器組合件，該濾波器組合件光學地耦接至該InGaAs光偵測器以改良信號雜訊比。
  7. 一種雷射指示器脈衝偵測器，包括：一二維光偵測器陣列，該陣列經組態以將雷射信號轉換成電信號；及一ROIC，該ROIC可操作地連接至該二維光偵測器陣列以調節來自該二維陣列之電信號以便在一單獨之模組中偵測、追踪及解碼該等電信號中之脈衝碼，其中該ROIC可操作地連接至該二維光偵測器陣列以調節該等電信號以便在一單獨之模組中同時偵測、追踪及解碼多個雷射光點。
  8. 如請求項7之雷射指示器脈衝偵測器，其中該二維光偵測器陣列包括複數列及複數行光偵測器。
  9. 如請求項7之雷射指示器脈衝偵測器，其中該二維陣列包括光偵測器之至少一32乘32陣列。
  10. 如請求項7之雷射指示器脈衝偵測器，其中該ROIC具有適於自該二維光偵測器陣列讀取圖框的至少20,000fps之一圖框速率。
  11. 如請求項7之雷射指示器脈衝偵測器，其中該二維光偵測器陣列包括InGaAs。
  12. 如請求項11之雷射指示器脈衝偵測器，其中該InGaAs經組態以接收直至且包括1.7微米之波長。
  13. 如請求項7之雷射指示器脈衝偵測器，進一步包括一濾波器組合件，該濾波器組合件光學地耦接至該二維光偵測器陣列以改良信號雜訊比。
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