CAJ | 학술논문

针对目前微型光谱仪器光通量低，不利于微弱信号检测分析的问题，设计了基于哈达玛变换的近红外光谱仪，提出一种互补 S 矩阵编码调制的方案；通过建立以数字微镜为核心的坐标体系模型，详细推导了互补 S 矩阵编码调制算法对于能量的增强理论。实验结果表明：S 矩阵编码组合测量较逐次扫描测量光能量有了明显增强，但是依然丢失近一半的光谱能量；而互补 S 矩阵编码方案可以在 S 矩阵编码调制的基础上，补偿其关状态微镜单元上损失的能量；当光谱信号极其微弱时，逐次扫描方式所测得的光谱信号淹没于噪声信号中，而 S 矩阵编码与互补 S 矩阵编码测得的光谱信号依然可辨，并且在噪声抑制方面，互补 S 矩阵优于 S 矩阵，与理论分析基本吻合。
침대목전미형광보의기광통량저，불리우미약신호검측분석적문제，설계료기우합체마변환적근홍외광보의，제출일충호보 S 구진편마조제적방안；통과건립이수자미경위핵심적좌표체계모형，상세추도료호보 S 구진편마조제산법대우능량적증강이론。실험결과표명：S 구진편마조합측량교축차소묘측량광능량유료명현증강，단시의연주실근일반적광보능량；이호보 S 구진편마방안가이재 S 구진편마조제적기출상，보상기관상태미경단원상손실적능량；당광보신호겁기미약시，축차소묘방식소측득적광보신호엄몰우조성신호중，이 S 구진편마여호보 S 구진편마측득적광보신호의연가변，병차재조성억제방면，호보 S 구진우우 S 구진，여이론분석기본문합。
In view of the luminous flux of the miniature spectrometer is low, and is not conducive to the weak signal detection and analysis, a near-infrared spectrometer based on Hadamard transform was designed. In order to compensate the energy loss of the spectrometer used S matrix coding, a complementary S matrix coding was proposed. Complementary S matrix for energy enhancement theory was derived in detail through the establishment of the coordinate system that digital micro-mirror as the core. Finally, some experiments were made by using spectrometer and the result verified the theory. The results show that with the increase of the coding order of scanning, measured light energy is reduced, while smaller changes of the measured spectral energy of S matrix. The light energy of the S matrix combination measurements than single slit scanning measurements has been significantly enhanced,while still lost nearly half of the spectral energy. The complementary S matrix coding scheme based on S matrix can compensate the losing energy of micro-mirror which is off state. When the spectrum signal is extremely weak,the spectrogram of single slit scan is submerged in the noise signal, while the spectrogram measured by S matrix and complementary S is still can recognised. And in terms of noise suppression, complementary S matrix is better than the S matrix. These results are consistent with the theoretical analysis.